Change the actions to auth as an app (#115)

## What was changed
Change the action to auth as an app.

## Why?
Can't let the action bypass branch protection rules while it's just
using an action token, so use the CI/CD app to do the CI/CD thing
without needing to sign commits and do a PR.

## Checklist
<!--- add/delete as needed --->

1. Closes <!-- add issue number here -->

2. How was this tested:
<!--- Please describe how you tested your changes/how we can test them
-->

3. Any docs updates needed?
<!--- update README if applicable
      or point out where to update docs.temporal.io -->

Author: jackdawm

.github/workflows/helm.yml

@@ -17,9 +17,18 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
+      - name: Generate token
+        id: generate_token
+        uses: actions/create-github-app-token@v2
+        with:
+          app-id: ${{ secrets.TEMPORAL_CICD_APP_ID }}
+          private-key: ${{ secrets.TEMPORAL_CICD_PRIVATE_KEY }}
+          owner: ${{ github.repository_owner }}
+          
       - name: Checkout
         uses: actions/checkout@v4
         with:
+          token: ${{ steps.generate_token.outputs.token }}
           fetch-depth: 0
 
       - name: Configure Git

.github/workflows/release.yml

@@ -12,9 +12,19 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
+    
+      - name: Generate token
+        id: generate_token
+        uses: actions/create-github-app-token@v2
+        with:
+          app-id: ${{ secrets.TEMPORAL_CICD_APP_ID }}
+          private-key: ${{ secrets.TEMPORAL_CICD_PRIVATE_KEY }}
+          owner: ${{ github.repository_owner }}
+
       - name: Checkout
         uses: actions/checkout@v4
         with:
+          token: ${{ steps.generate_token.outputs.token }}
           fetch-depth: 0
 
       - name: Set up Go