chore(ci): retire Python 3.9 layer automation

Remove Python 3.9 from active deployment and bootstrap matrices so new layer releases no longer request nonexistent artifacts. Keep partition verification for the final Python 3.9 layer pinned to version 27.

Fixes GH-8434

Author: dreamorosi

.github/workflows/bootstrap_region.yml

@@ -80,13 +80,11 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39-arm64
           - AWSLambdaPowertoolsPythonV3-python310-arm64
           - AWSLambdaPowertoolsPythonV3-python311-arm64
           - AWSLambdaPowertoolsPythonV3-python312-arm64
           - AWSLambdaPowertoolsPythonV3-python313-arm64
           - AWSLambdaPowertoolsPythonV3-python314-arm64
-          - AWSLambdaPowertoolsPythonV3-python39-x86_64
           - AWSLambdaPowertoolsPythonV3-python310-x86_64
           - AWSLambdaPowertoolsPythonV3-python311-x86_64
           - AWSLambdaPowertoolsPythonV3-python312-x86_64

.github/workflows/layer_govcloud.yml

@@ -52,7 +52,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312
@@ -98,7 +97,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312
@@ -167,7 +165,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312

.github/workflows/layer_govcloud_verify.yml

@@ -28,7 +28,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312
@@ -59,7 +58,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312
@@ -91,7 +89,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312

.github/workflows/layers_partition_verify.yml

@@ -77,6 +77,7 @@ jobs:
     strategy:
       matrix:
         layer:
+          # Python 3.9 remains here to verify its final layer version.
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
@@ -94,9 +95,11 @@ jobs:
           aws-region: us-east-1
           mask-aws-account-id: true
       - name: Output ${{ matrix.layer }}-${{ matrix.arch }}
+        env:
+          VERSION: ${{ matrix.layer == 'AWSLambdaPowertoolsPythonV3-python39' && '27' || inputs.version }}
         # fetch the specific layer version information from the us-east-1 commercial region
         run: |
-          aws --region us-east-1 lambda get-layer-version-by-arn --arn 'arn:aws:lambda:us-east-1:017000801446:layer:${{ matrix.layer }}-${{ matrix.arch }}:${{ inputs.version }}' > '${{ matrix.layer }}-${{ matrix.arch }}.json'
+          aws --region us-east-1 lambda get-layer-version-by-arn --arn "arn:aws:lambda:us-east-1:017000801446:layer:${{ matrix.layer }}-${{ matrix.arch }}:${VERSION}" > '${{ matrix.layer }}-${{ matrix.arch }}.json'
       - name: Store Metadata
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
@@ -120,6 +123,7 @@ jobs:
       matrix:
         region: ${{ fromJson(needs.setup.outputs.regions) }}
         layer:
+          # Python 3.9 remains here to verify its final layer version.
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
@@ -146,8 +150,10 @@ jobs:
           audience: ${{ needs.setup.outputs.aud }}
       - id: partition_version
         name: Partition Layer Version
+        env:
+          VERSION: ${{ matrix.layer == 'AWSLambdaPowertoolsPythonV3-python39' && '27' || inputs.partition_version || inputs.version }}
         run: |
-          echo 'partition_version=$([[ -n "${{ inputs.partition_version}}" ]] && echo ${{ inputs.partition_version}} || echo ${{ inputs.version }} )' >> "$GITHUB_OUTPUT"
+          echo "partition_version=$VERSION" >> "$GITHUB_OUTPUT"
       - name: Verify Layer
         run: |
           export layer_output='${{ matrix.layer }}-${{ matrix.arch }}-${{matrix.region}}.json'

.github/workflows/layers_partitions.yml

@@ -78,7 +78,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312
@@ -150,7 +149,6 @@ jobs:
       matrix:
         region: ${{ fromJson(needs.setup.outputs.regions) }}
         layer:
-          - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
           - AWSLambdaPowertoolsPythonV3-python312