feat: jreleaser check action

.github/actions/jreleaser/action.yml

@@ -0,0 +1,22 @@
+# TODO: Delete this action when we migrate off JReleaser for all our releases
+
+name: JReleaser check
+description: Smoke test that checks our jreleaser release command works
+runs:
+  using: composite
+  steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Configure Gradle
+      uses: awslabs/aws-kotlin-repo-tools/.github/actions/configure-gradle@main
+
+    - name: Test jreleaserFullRelease
+      shell: bash
+      run: |
+        export JRELEASER_PROJECT_JAVA_GROUP_ID="com.sonatype.central.testing.amazon"
+        export JRELEASER_MAVENCENTRAL_USERNAME="foo"
+        export JRELEASER_MAVENCENTRAL_TOKEN="foo"
+        export JRELEASER_GENERIC_TOKEN="foo"
+
+        ./gradlew jreleaserFullRelease --dryrun --stacktrace