[NodeJS][TS2345] error when hookup nodejs client to dashboards

[ananzh]

Describe the bug
See 20 TS2345 errors in two files when hook up nodejs to dashboards (related issue here ). Details are:

• ensure_opensearch_version.ts

src/core/server/opensearch/version_check/ensure_opensearch_version.ts:211:5 - error TS2345: Argument of type 'OperatorFunction<number, unknown>' is not assignable to parameter of type 'OperatorFunction<number, NodesInfo>'. Type 'unknown' is not assignable to type 'NodesInfo'. 211  exhaustMap(() => {    ~~~~~~~~~~~~~~~~~~ 212  /*   ~~~~~~~~ ...  245  }   ~~~~~~~ 246  }),   ~~~~~~

src/core/server/opensearch/version_check/ensure_opensearch_version.ts:227:19 - error TS2345: Argument of type '({ body }: { body: any; }) => any' is not assignable to parameter of type '(value: unknown, index: number) => any'. Types of parameters '__0' and 'value' are incompatible. Type 'unknown' is not assignable to type '{ body: any; }'. 227  map(({ body }) => body),

src/core/server/opensearch/version_check/ensure_opensearch_version.ts:240:15 - error TS2345: Argument of type '({ body }: { body: any; }) => any' is not assignable to parameter of type '(value: unknown, index: number) => any'. Types of parameters '__0' and 'value' are incompatible. Type 'unknown' is not assignable to type '{ body: any; }'. 240  map(({ body }) => body),

• opensearch_index.test.ts

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:44:42 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 44  const info = await Index.fetchInfo(client, '.opensearch_dashboards_test');

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:69:36 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 69  await expect(Index.fetchInfo(client, '.baz')).rejects.toThrow(```

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:88:36 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 88  await expect(Index.fetchInfo(client, '.baz')).rejects.toThrow(

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:104:42 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 104  const info = await Index.fetchInfo(client, '.baz');

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:116:31 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 116  await Index.createIndex(client, '.abcd', { foo: 'bar' } as any);

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:134:31 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 134  await Index.deleteIndex(client, '.lotr');

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:149:30 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 149  await Index.claimAlias(client, '.hola-42', '.hola');

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:174:30 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 174  await Index.claimAlias(client, '.ze-index', '.muchacha');

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:197:30 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 197  await Index.claimAlias(client, '.ze-index', '.muchacha', [

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:242:9 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 242  client,

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:322:41 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 322  await expect(Index.convertToAlias(client, info, '.muchacha', 10)).rejects.toThrow(

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:382:25 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 382  await Index.write(client, index, docs);

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:461:33 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 461  const read = Index.reader(client, index, { batchSize: 100, scrollDuration: '5m' });

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:514:33 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 514  const read = Index.reader(client, index, {

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:531:33 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 531  const read = Index.reader(client, index, {

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:566:33 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. 566  const read = Index.reader(client, index, {

src/core/server/saved_objects/migrations/core/opensearch_index.test.ts:595:60 - error TS2345: Argument of type 'DeeplyMockedKeys<OpenSearchClient>' is not assignable to parameter of type 'MigrationOpenSearchClient'. Type 'DeeplyMockedKeys<OpenSearchClient>' is missing the following properties from type 'MigrationOpenSearchClient': bulk, cat, clearScroll, count, and 5 more. 595  const hasMigrations = await Index.migrationsUpToDate(client, index, migrations);

To Reproduce
Hook up nodejs client to dashboards using node-14. I have a hooked up branch here. Then after removind node-modules, run yarn osd bootstrap.

Expected behavior
Fix the error.