Add auto labeler workflow (#455)

Signed-off-by: Tyler Ohlsen <ohltyler@amazon.com>
(cherry picked from commit 3bdb4f6)

.github/labeler.yml

@@ -0,0 +1,21 @@
+backport 1.x:
+  - "*"
+  - "*/*"
+  - "*/**/*"
+  - "*/**/**/*"
+  - "*/**/**/**/*"
+  - "*/**/**/**/**/*"
+  - "*/**/**/**/**/**/*"
+  - "*/**/**/**/**/**/**/*"
+  - "*/**/**/**/**/**/**/**/*"
+  - "*/**/**/**/**/**/**/**/**/*"
+  - ".github/**/*"
+
+infra:
+  - ".github/**/*"
+  - "build.gradle"
+
+documentation:
+  - "*.md"
+  - "release-notes/*"
+  - "docs/*"

.github/workflows/labeler.yml

@@ -0,0 +1,26 @@
+name: "Pull Request Labeler"
+on:
+  pull_request_target:
+    branches:
+      - main
+    types:
+      - opened
+
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - name: GitHub App token
+        id: github_app_token
+        uses: tibdex/github-app-token@v1.5.0
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          installation_id: 22958780
+      - name: Label
+        uses: actions/labeler@v4
+        with:
+          repo-token: ${{ steps.github_app_token.outputs.token }}