Create PR in operator repo on javaagent release. (#5710)

* File issue in operator repo on javaagent release.

* Open PR instead of issue

Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>

.github/workflows/release.yml

@@ -150,10 +150,54 @@ jobs:
                             v$VERSION \
                             opentelemetry-javaagent.jar
 
+      - uses: actions/checkout@v3
+        with:
+          repository: opentelemetry-java-bot/opentelemetry-operator
+          # this is the PAT used for "git push" below
+          token: ${{ secrets.OPENTELEMETRY_JAVA_BOT_TOKEN }}
+
+      - name: Initialize pull request branch
+        env:
+          VERSION: ${{ steps.set-versions.outputs.release-version }}
+        run: |
+          git remote add upstream https://github.com/open-telemetry/opentelemetry-operator.git
+          git fetch upstream
+          git checkout -b update-opentelemetry-javaagent-to-$VERSION upstream/main
+
+      - name: Bump version
+        env:
+          VERSION: ${{ steps.set-versions.outputs.release-version }}
+        run: |
+          echo $VERSION > autoinstrumentation/java/version.txt
+
+      - name: Set up git name
+        run: |
+          git config user.name opentelemetry-java-bot
+          git config user.email 97938252+opentelemetry-java-bot@users.noreply.github.com
+
+      - name: Create pull request against opentelemetry-operator
+        env:
+          VERSION: ${{ steps.set-versions.outputs.release-version }}
+          # this is the PAT used for "gh pr create" below
+          GITHUB_TOKEN: ${{ secrets.OPENTELEMETRY_JAVA_BOT_TOKEN }}
+        run: |
+          msg="Update opentelemetry-javaagent version to $VERSION"
+          git commit -a -m "$msg"
+
+          # gh pr create doesn't have a way to explicitly specify different head and base
+          # repositories currently, but it will implicitly pick up the head from a different
+          # repository if you set up a tracking branch
+
+          git push --set-upstream origin update-opentelemetry-javaagent-to-$VERSION
+
+          gh pr create --title "$msg" \
+                       --body "$msg" \
+                       --repo open-telemetry/opentelemetry-operator
+
       - uses: actions/checkout@v3
         with:
           ref: main
-          # history is needed in order to generate the patch
+          # history is needed in order to run git format-patch below
           fetch-depth: 0
 
       - name: Set up git name