Integrate Exchange retention reset in CI (#2807)

Adds retention to current CI action
---

#### Does this PR need a docs update or release note?

- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No

#### Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [x] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issue(s)


#### Test Plan

<!-- How will this be tested prior to merging.-->
- [x] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

.github/actions/purge-m365-user-data/action.yml

@@ -43,6 +43,16 @@ runs:
       run: |
         ./foldersAndItems.ps1 -WellKnownRoot root -User ${{ inputs.user }} -FolderPrefixPurge ${{ inputs.folder-prefix }} -FolderBeforePurge ${{ inputs.older-than }}
 
+    - name: Reset retention for all mailboxes to 0
+      if: ${{ inputs.folder-prefix == '' && inputs.user == '' }}
+      shell: pwsh
+      working-directory: ./src/cmd/purge/scripts
+      env:
+        M365TENANT_ADMIN_USER: ${{ inputs.m365-admin-user }}
+        M365TENANT_ADMIN_PASSWORD: ${{ inputs.m365-admin-password }}
+      run: |
+        ./setRetention.ps1
+
     - name: Run the static purge script set
       if: ${{ inputs.folder-prefix == '' }}
       shell: pwsh

.github/workflows/ci_test_cleanup.yml

@@ -13,6 +13,11 @@ jobs:
       matrix:
         folder: [Corso_Restore_, TestRestore, testfolder, incrementals_ci_, Alcion_Restore_, '']
         user: [CORSO_M365_TEST_USER_ID, CORSO_SECONDARY_M365_TEST_USER_ID, EXT_SDK_TEST_USER_ID]
+        # jobs are expanded per user. Try to run 2 jobs per active user at a time
+        max-parallel: 6
+        include:
+          - folder: ""
+            user: ""
 
     steps:
       - uses: actions/checkout@v3
@@ -37,3 +42,5 @@ jobs:
           azure-client-id: ${{ secrets.CLIENT_ID }}
           azure-client-secret: ${{ secrets.CLIENT_SECRET }}
           azure-tenant-id: ${{ secrets.TENANT_ID }}
+          m365-admin-user: ${{ secrets.M365_TENANT_ADMIN_USER }}
+          m365-admin-password: ${{ secrets.M365_TENANT_ADMIN_PASSWORD }}