Refactor Terraform workflow to use GitHub Actions setup and cache

This commit refactors the Terraform workflow to use the GitHub Actions setup and cache. It removes the unnecessary steps for checking out the repository and blowing up the .terraform directory. It also adds the setup for AWS and GitHub credentials. The Terraform init and plan steps are now using the CSVD/terraform-init and CSVD/terraform-plan actions, respectively, with specific versions and workspace configurations.

.github/workflows/terraform_plan.yaml

@@ -28,16 +28,6 @@ jobs:
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v3
-
-      - uses: CSVD/gh-actions-setup-node@v3
-        with:
-           node-version: 16
-
-      - name: blow up .terraform
-        run: rm -rf ${{ github.workspace }}/.terraform || echo "nope"
-
       - name: Setup AWS Credentials
         id: aws_credentials
         run: |
@@ -48,25 +38,27 @@ jobs:
           echo AWS_SECRET_ACCESS_KEY=`jq -r '.SecretAccessKey' aws_credentials.json` >> $GITHUB_ENV
           aws configure set aws_session_token `jq -r '.Token' aws_credentials.json`
           echo AWS_SESSION_TOKEN=`jq -r '.Token' aws_credentials.json` >> $GITHUB_ENV
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
 
       - name: Setup GITHUB Credentials
         id: github_credentials
         run: |
           echo GITHUB_TOKEN=$(python encode_jwt.py "$GITHUB_APP_PEM_FILE" "$GITHUB_APP_INSTALLATION_ID" "$GITHUB_BASE_URL") >> $GITHUB_ENV
 
       - name: Terraform Init
-        id: init
-        run: /opt/tfenv/bin/terraform init -upgrade
-
-      - name: Terraform Validate
-        id: validate
-        run: /opt/tfenv/bin/terraform validate
+        uses: CSVD/terraform-init@main
+        id: terraform_init
+        with:
+          terraform_version: "1.9.1"
+          workspace: ${{ vars.terraform_workspace }}
+          setup_terraform: true
+          terraform_init: true
 
       - name: Terraform Plan
-        id: plan
-        run: /opt/tfenv/bin/terraform plan -var-file=varfiles/${{ vars.terraform_workspace }}.tfvars
-
-#       - name: Terraform Apply
-#         id: plan
-#         run: /opt/tfenv/bin/terraform apply -auto-approve -var-file=varfiles/${{ vars.terraform_workspace }}.tfvars
-#         continue-on-error: true
+        uses: CSVD/terraform-plan@main
+        with:
+          terraform_version: "1.9.1"
+          workspace: ${{ vars.terraform_workspace }}
+          commit_sha: ${{ steps.terraform_init.outputs.commit_sha }}
+          varfile: varfiles/${{ vars.terraform_workspace }}.tfvars
+          download_cache: true