Use go.mod as source of Go version number for workflows

Go is used in the development and maintenance of the project. A standardized version of Go is used for all operations.

This version is defined in the `go` directive of the `go.mod` metadata file.

Go is installed in the GitHub Actions runner environments using the "actions/setup-go" action, which also must be
configured to install the correct version of Go. Previously the version number for use by the "actions/setup-go" action
was defined in each workflow. This meant that we had multiple copies of the Go version information, all of which had to
be kept in sync.

Fortunately, support for using `go.mod` as the source of version information for the "actions/setup-go" action was
recently added. This means it is now possible for all workflows to get the Go version from a single source.

Author: per1234

workflow-templates/check-go-dependencies-task.yml

@@ -1,10 +1,6 @@
 # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-go-dependencies-task.md
 name: Check Go Dependencies
 
-env:
-  # See: https://github.com/actions/setup-go/tree/main#supported-version-syntax
-  GO_VERSION: "1.17"
-
 # See: https://docs.github.com/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows
 on:
   create:
@@ -87,7 +83,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: go.mod
 
       - name: Install Task
         uses: arduino/setup-task@v2
@@ -146,7 +142,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: go.mod
 
       - name: Install Task
         uses: arduino/setup-task@v2

workflow-templates/check-go-task.yml

@@ -1,10 +1,6 @@
 # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-go-task.md
 name: Check Go
 
-env:
-  # See: https://github.com/actions/setup-go/tree/main#supported-version-syntax
-  GO_VERSION: "1.17"
-
 # See: https://docs.github.com/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows
 on:
   create:
@@ -78,7 +74,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: ${{ matrix.module.path }}/go.mod
 
       - name: Install Task
         uses: arduino/setup-task@v2
@@ -117,7 +113,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: ${{ matrix.module.path }}/go.mod
 
       - name: Install Task
         uses: arduino/setup-task@v2
@@ -158,7 +154,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: ${{ matrix.module.path }}/go.mod
 
       - name: Install Task
         uses: arduino/setup-task@v2
@@ -197,7 +193,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: ${{ matrix.module.path }}/go.mod
 
       - name: Run go mod tidy
         working-directory: ${{ matrix.module.path }}

workflow-templates/deploy-cobra-mkdocs-versioned-poetry.yml

@@ -2,8 +2,6 @@
 name: Deploy Website
 
 env:
-  # See: https://github.com/actions/setup-go/tree/main#supported-version-syntax
-  GO_VERSION: "1.17"
   # See: https://github.com/actions/setup-python/tree/main#available-versions-of-python
   PYTHON_VERSION: "3.9"
 
@@ -67,7 +65,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: go.mod
 
       - name: Install Python
         uses: actions/setup-python@v5

workflow-templates/release-go-crosscompile-task.yml

@@ -10,8 +10,6 @@ env:
   AWS_PLUGIN_TARGET: TODO_AWS_PLUGIN_TARGET
   AWS_REGION: "us-east-1"
   ARTIFACT_PREFIX: dist-
-  # See: https://github.com/actions/setup-go/tree/main#supported-version-syntax
-  GO_VERSION: "1.17"
 
 on:
   push:
@@ -65,7 +63,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: go.mod
 
       - name: Install Task
         uses: arduino/setup-task@v2

workflow-templates/test-go-integration-task.yml

@@ -2,8 +2,6 @@
 name: Test Integration
 
 env:
-  # See: https://github.com/actions/setup-go/tree/main#supported-version-syntax
-  GO_VERSION: "1.17"
   # See: https://github.com/actions/setup-python/tree/main#available-versions-of-python
   PYTHON_VERSION: "3.9"
 
@@ -83,7 +81,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: go.mod
 
       - name: Install Python
         uses: actions/setup-python@v5

workflow-templates/test-go-task.yml

@@ -1,10 +1,6 @@
 # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/test-go-task.md
 name: Test Go
 
-env:
-  # See: https://github.com/actions/setup-go/tree/main#supported-version-syntax
-  GO_VERSION: "1.17"
-
 # See: https://docs.github.com/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows
 on:
   create:
@@ -90,7 +86,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: go.mod
 
       - name: Install Task
         uses: arduino/setup-task@v2