actions: use go-version-file: .go-version (#1841)

see actions/setup-go#295

(cherry picked from commit 3d8e3c7)

Author: v1v

.github/workflows/changelog.yml

@@ -6,11 +6,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - name: Fetch Go version from .go-version
-      run: echo "GO_VERSION=$(cat .go-version)" >> $GITHUB_ENV
     - uses: actions/setup-go@v3
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: .go-version
     - name: check pr-has-fragment
       run: |
         GOBIN=$PWD/bin go install github.com/elastic/elastic-agent-changelog-tool@latest

.github/workflows/golangci-lint.yml

@@ -20,14 +20,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      # Uses Go version from the repository.
-      - name: Read .go-version file
-        id: goversion
-        run: echo "::set-output name=version::$(cat .go-version)"
-
       - uses: actions/setup-go@v3
         with:
-          go-version: "${{ steps.goversion.outputs.version }}"
+          go-version-file: .go-version
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3

.github/workflows/macos.yml

@@ -12,11 +12,9 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v3
-    - name: Fetch Go version from .go-version
-      run: echo "GO_VERSION=$(cat .go-version)" >> $GITHUB_ENV
     - uses: actions/setup-go@v3
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: .go-version
     - name: Install dependencies
       run:  go install github.com/magefile/mage
     - name: Run build