[NET-4895] ci - api tests and consul container tests error because of dependency bugs with go 1.20.6. Pin go to 1.20.5. (#18124)

### Description
The following jobs started failing when go 1.20.6 was released:
- `go-test-api-1-19`
- `go-test-api-1-20`
- `compatibility-integration-tests`
- `upgrade-integration-tests`

`compatibility-integration-tests` and `compatibility-integration-tests`
to this testcontainers issue:
https://github.com/testcontainers/testcontainers-go/issues/1359. This
issue calls for testcontainers to release a new version when one of
their dependencies is fixed. When that is done, we will unpin the go
versions in `compatibility-integration-tests` and
`compatibility-integration-tests`.

### Testing & Reproduction steps

See these jobs broken in CI and then see them work with this PR.

---------

Co-authored-by: Chris Thain <32781396+cthain@users.noreply.github.com>

.github/workflows/go-tests.yml

@@ -376,6 +376,7 @@ jobs:
       runs-on: ${{ needs.setup.outputs.compute-xl }}
       repository-name: ${{ github.repository }}
       go-tags: "${{ github.event.repository.name == 'consul-enterprise' && 'consulent consulprem consuldev' || '' }}"
+      go-version: "1.19.10"
     permissions:
       id-token: write # NOTE: this permission is explicitly required for Vault auth.
       contents: read
@@ -394,6 +395,12 @@ jobs:
       runs-on: ${{ needs.setup.outputs.compute-xl }}
       repository-name: ${{ github.repository }}
       go-tags: "${{ github.event.repository.name == 'consul-enterprise' && 'consulent consulprem consuldev' || '' }}"
+      # pinning this to 1.20.5 because this issue in go-testcontainers occurs
+      # in 1.20.6 with the error "http: invalid Host header, host port waiting failed"
+      # https://github.com/testcontainers/testcontainers-go/issues/1359
+      # remove setting this when the above issue is fixed so that the reusable
+      # job will just get the go version from go.mod.
+      go-version: "1.20.5"
     permissions:
       id-token: write # NOTE: this permission is explicitly required for Vault auth.
       contents: read
@@ -412,6 +419,7 @@ jobs:
       runs-on: ${{ needs.setup.outputs.compute-xl }}
       repository-name: ${{ github.repository }}
       go-tags: "${{ github.event.repository.name == 'consul-enterprise' && 'consulent consulprem consuldev' || '' }}"
+      go-version: "1.19"
     permissions:
       id-token: write # NOTE: this permission is explicitly required for Vault auth.
       contents: read

.github/workflows/reusable-unit.yml

@@ -33,6 +33,10 @@ on:
         required: false
         type: string
         default: ""
+      go-version:
+        required: false
+        type: string
+        default: ""
     secrets:
       elevated-github-token:
         required: true
@@ -59,6 +63,12 @@ jobs:
         if: ${{ endsWith(inputs.repository-name, '-enterprise') }}
         run: git config --global url."https://${{ secrets.elevated-github-token }}:@github.com".insteadOf "https://github.com"
       - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
+        if: ${{ inputs.go-version != '' }}
+        with:
+          go-version: ${{ inputs.go-version }}
+          cache: true
+      - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
+        if: ${{ inputs.go-version == '' }}
         with:
           go-version-file: 'go.mod'
           cache: true

.github/workflows/test-integrations.yml

@@ -372,7 +372,11 @@ jobs:
         run: git config --global url."https://${{ secrets.ELEVATED_GITHUB_TOKEN }}:@github.com".insteadOf "https://github.com"
       - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
         with:
-          go-version-file: 'go.mod'
+          # pinning this to 1.20.5 because this issue in go-testcontainers occurs
+          # in 1.20.6 with the error "http: invalid Host header, host port waiting failed"
+          # https://github.com/testcontainers/testcontainers-go/issues/1359
+          # go-version-file: 'go.mod'
+          go-version: '1.20.5'
       - run: go env
       - name: docker env
         run: |
@@ -487,7 +491,11 @@ jobs:
         run: git config --global url."https://${{ secrets.ELEVATED_GITHUB_TOKEN }}:@github.com".insteadOf "https://github.com"
       - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
         with:
-          go-version-file: 'go.mod'
+          # pinning this to 1.20.5 because this issue in go-testcontainers occurs
+          # in 1.20.6 with the error "http: invalid Host header, host port waiting failed"
+          # https://github.com/testcontainers/testcontainers-go/issues/1359
+          # go-version-file: 'go.mod'
+          go-version: '1.20.5'
       - run: go env
 
       # Get go binary from workspace