chore(mocks): fully migrate mockery to gomock (#3031)

- Replace all generated mockery by mockgen generated mocks
- Replace all usages of mockery mocks with new mockgen mocks
- Fix mock usages (sometimes with `.AnyTimes()`)
- Replace all `mock.Anything` and `mock.AnyAssignableTo` by `gomock.Any()`
- Remove mockery from CI
- Remove mockery from documentation
- Use local `ECSAPI` interface for devnet for a (much) smaller generated mock (-4000 lines)

.github/CONTRIBUTING.md

@@ -76,8 +76,6 @@ For coding style, you may refer to the [code style](CODE_STYLE.md) document whic
 
     Generate the mock code with `go generate -run "mockgen" ./...` from your working directory. This will also update existing mocks. You can update all mocks by running `go generate -run "mockgen" ./...` from the repository root. Note this does not log anything out.
 
-    ⚠️ We are still using `mockery` instead of `gomock` for older mocks, so you need to run `go generate -run "mockery|mockgen" ./...` to update all the existing mocks. We are slowly migrating our mocks and test code to use `gomock`.
-
     > To execute `//go:generate` commands that are placed at files with `//go:build integration` remember to add `-tags integration` in the `go generate` command eg. `go generate -tags integration ...`
 
 9. **Lint your changes.**

.github/workflows/mocks.yml

@@ -21,22 +21,18 @@ jobs:
           stable: true
           check-latest: true
 
-      - run: go install github.com/vektra/mockery/v2@v2.14
-
       - run: go install github.com/golang/mock/mockgen@v1.6
 
       - name: Check devnet module
         run: |
           cd devnet && \
           go mod download && \
-          go generate -run "mockery" -tags integration ./... && \
           go generate -run "mockgen" -tags integration ./... && \
           git diff --exit-code && \
           cd ..
 
       - name: Check Gossamer module
         run: |
           go mod download && \
-          go generate -run "mockery" -tags integration ./... && \
           go generate -run "mockgen" -tags integration ./... && \
           git diff --exit-code

devnet/cmd/scale-down-ecs-service/internal/interfaces.go

@@ -0,0 +1,20 @@
+// Copyright 2023 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
+package internal
+
+import (
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/service/ecs"
+)
+
+// ECSAPI is the interface for the ECS API.
+type ECSAPI interface {
+	ListServicesWithContext(aws.Context, *ecs.ListServicesInput, ...request.Option) (
+		*ecs.ListServicesOutput, error)
+	UpdateServiceWithContext(aws.Context, *ecs.UpdateServiceInput, ...request.Option) (
+		*ecs.UpdateServiceOutput, error)
+	DescribeServicesWithContext(aws.Context, *ecs.DescribeServicesInput, ...request.Option) (
+		*ecs.DescribeServicesOutput, error)
+}