Backporting Auto release workflow to 2.x (#5582)

* Backporting auto release workflow to 2.x

Signed-off-by: Sarat Vemulapalli <vemulapallisarat@gmail.com>

* Adding Changelog

Signed-off-by: Sarat Vemulapalli <vemulapallisarat@gmail.com>

* Adding Changelog

Signed-off-by: Sarat Vemulapalli <vemulapallisarat@gmail.com>

Signed-off-by: Sarat Vemulapalli <vemulapallisarat@gmail.com>

.github/workflows/auto-release.yml

@@ -0,0 +1,29 @@
+name: Releases
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: 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: Get tag
+        id: tag
+        uses: dawidd6/action-get-tag@v1
+      - uses: actions/checkout@v2
+      - uses: ncipollo/release-action@v1
+        with:
+          github_token: ${{ steps.github_app_token.outputs.token }}
+          bodyFile: release-notes/opensearch.release-notes-${{steps.tag.outputs.tag}}.md

CHANGELOG.md

@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Added jackson dependency to server ([#5366] (https://github.com/opensearch-project/OpenSearch/pull/5366))
 - Added experimental extensions to main ([#5347](https://github.com/opensearch-project/OpenSearch/pull/5347))
 - Adding support to register settings dynamically ([#5495](https://github.com/opensearch-project/OpenSearch/pull/5495))
+- Adding auto release workflow ([#5582](https://github.com/opensearch-project/OpenSearch/pull/5582))
 
 ### Dependencies
 - Bump bcpg-fips from 1.0.5.1 to 1.0.7.1 ([#5148](https://github.com/opensearch-project/OpenSearch/pull/5148))