[MD] Meta issue from feedback session & comments in closed PR

[zhongnansu]

Issues created based on #2400, #2409, #2399

• [BUG] OSD returns HTTP 500 internal server error messages when the wrapping key is changed #2210
• [MD] Polish Header wording #2434
• [MD] Support test connection for datasource #2435
• [MD] Add multi data source sample config in yml template #2427
• [MD] Check data source name existence before creating #2426
• [MD] Fix view single document issue by updating low-level search call param #2431
• [MD] update password is not working #2489

[mpabba3003]

• [MD] Documentation for "data_source" plugin #2436
• [MD] Documentation for "data_source_management" plugin #2437
• [MD] Update links to redirect to new application #2440
• [MD] Delete modal should be updated as per open serach standards #2438
• [MD] Polish helper text - Endpoint field in create/update datasource page #2439
• [MD] move static text content i18n translation into respective components to make text translated dynamically #2543
• [MD] Add unit test coverage for Data source management #2566
• [MD] Add cypress integration tests for Datasource management #2576

[zhongnansu]

#2409 (comment)
@mpabba3003 please take a look

[seraphjiang]

GLOBAL APP TO DO:
opensearch-project/ux#16

• If an error is present on any page within the application due to a provided endpoint becoming unavailable or authentication failing, present user with a toast message appropriate to the error case -- defer to 2.5

kroosh to update issue with approved error messages following writing meeting -- need more clarification to understand, defer to 2.5 or next

STACK MANAGEMENT NAVIGATION:

opensearch-project/ux#17 -- done, need to raise a pr.

DATA SOURCE LIST COMPONENT:

opensearch-project/ux#18
opensearch-project/ux#19
opensearch-project/ux#21
opensearch-project/ux#22

CREATE DATA SOURCE CONNECTION:

opensearch-project/ux#23
opensearch-project/ux#24
opensearch-project/ux#25
opensearch-project/ux#26
opensearch-project/ux#27 -- defer to 2.5
opensearch-project/ux#28 -- frontend validation

UPDATE DATA SOURCE COMPONENT:

a lot validation enhancement.

opensearch-project/ux#29
Update authentication section -- need to change drop down and description
Change authentication details to authentication method
update ui to reflect radio button selection
update Description input box label to Description - optional
Implement error handling on all required input boxes
Check for required value onBlur and onChange. If required value is missing, input box state changes to Error and user is prevented from submitting form (submit button disabled state)
update Update Password modal to include rendered username
Remove old password from Update Password modal
update delete modal text
update Update Password button to read Update Stored Password
Update Update Password modal header to Update stored password

INDEX PATTERN COMPONENT:

Implement experimental feature warning call out (OUICallout)
Update table to include data source column - always float default to top, mark default with badge (OUIBadge) -- need more discussion, too later to add to 2.4

INDEX PATTERN CREATE WIZARD
STEP 1:

Implement warning call out (OUICallout)
STEP 2 :

Implement warning call out (OUI Callout)

Update index pattern name input box to display Data Source before input box - data source is not editable
STEP 3 :

Implement warning call out (OUI Callout)