Add Lambda layer artifact in Release assets (aws-observability#330)

Lambda container users can download the layer zip file from assets.

*Issue #, if available:*

*Description of changes:*


By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice.

Author: wangzlei

.github/workflows/release-lambda.yml

@@ -159,34 +159,33 @@ jobs:
       - name: generate layer-note
         working-directory: ${{ env.LAYER_NAME }}
         run: |
-          echo "| Region | Layer ARN |" >> layer-note
-          echo "|  ----  | ----  |" >> layer-note
+          echo "| Region | Layer ARN |" >> ../layer-note
+          echo "|  ----  | ----  |" >> ../layer-note
           for file in *
           do
           read arn < $file
-          echo "| " $file " | " $arn " |" >> layer-note
+          echo "| " $file " | " $arn " |" >> ../layer-note
           done
-          cat layer-note
+          cat ../layer-note
       - name: generate tf layer
         working-directory: ${{ env.LAYER_NAME }}
         run: |
-          echo "locals {" >> ../layer.tf
-          echo "  sdk_layer_arns = {" >> ../layer.tf
+          echo "locals {" >> ../layer_arns.tf
+          echo "  sdk_layer_arns = {" >> ../layer_arns.tf
           for file in *
           do
           read arn < $file
-          echo "    \""$file"\" = \""$arn"\"" >> ../layer.tf
+          echo "    \""$file"\" = \""$arn"\"" >> ../layer_arns.tf
           done
           cd ..
-          echo "  }" >> layer.tf
-          echo "}" >> layer.tf
-          terraform fmt layer.tf
-          cat layer.tf
-      - name: upload layer tf file
-        uses: actions/upload-artifact@v4
+          echo "  }" >> layer_arns.tf
+          echo "}" >> layer_arns.tf
+          terraform fmt layer_arns.tf
+          cat layer_arns.tf
+      - name: download layer.zip
+        uses: actions/download-artifact@v4
         with:
-          name: layer.tf
-          path: layer.tf
+          name: layer.zip
       - name: Get commit hash
         id: commit
         run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
@@ -197,7 +196,7 @@ jobs:
           echo "" >> release_notes.md
           echo "See new Lambda Layer ARNs:" >> release_notes.md
           echo "" >> release_notes.md
-          cat ${{ env.LAYER_NAME }}/layer-note >> release_notes.md
+          cat layer-note >> release_notes.md
           echo "" >> release_notes.md
           echo "Notes:" >> release_notes.md
       - name: Create GH release
@@ -210,6 +209,6 @@ jobs:
              --notes-file release_notes.md  \
              --draft \
              "lambda-v${{ github.event.inputs.version }}-${{ steps.commit.outputs.sha_short }}" \
-             layer.tf
+             layer_arns.tf layer.zip
           echo Removing release_notes.md ...
           rm -f release_notes.md