fix(workflow): Replace getSantry with dedicated GH app for api schema workflow (#17155)

We added the new default rulesets that requires all commit to go through
PRs and that breaks this workflow.
Added the following changes to fix it
- created a new dedicated github app for this
- added the github app to allowlist in the ruleset
- update the workflow to use the new github app instead of `getSantry`
- added the app-id and private key through org secrets and variables
- update the git commit info to use the github app

Author: Jeffreyhung

.github/workflows/bump-api-schema-sha.yml

@@ -16,8 +16,11 @@ jobs:
         id: token
         uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
         with:
-          app-id: ${{ vars.SENTRY_INTERNAL_APP_ID }}
-          private-key: ${{ secrets.SENTRY_INTERNAL_APP_PRIVATE_KEY }}
+          app-id: ${{ vars.SENTRY_API_SCHEMA_UPDATER_APP_CLIENT_ID }}
+          private-key: ${{ secrets.SENTRY_API_SCHEMA_UPDATER_PRIVATE_KEY }}
+          repositories: |
+            sentry-docs
+            sentry-api-schema
       - name: 'Bump API Schema SHA'
         shell: bash
         env:
@@ -28,8 +31,8 @@ jobs:
         run: |
           set -euo pipefail
 
-          git config user.email "bot@getsentry.com"
-          git config user.name "openapi-getsentry-bot"
+          git config user.email "271575301+sentry-api-schema-updater[bot]@users.noreply.github.com"
+          git config user.name "sentry-api-schema-updater[bot]"
 
           filepath="src/build/resolveOpenAPI.ts"