Disable Azure Pipelines CI for release branch

It is completely superfluous because the release pipeline runs the exact same CI
template, and it's still really flaky.

Also run the GitHub Actions CI with the Release configuration.

Author: andyleejordan

.github/workflows/ci-test.yml

@@ -52,12 +52,12 @@ jobs:
 
       - name: Build and test
         shell: pwsh
-        run: Invoke-Build ${{ github.event_name == 'merge_group' && 'TestFull' || 'Test' }}
+        run: Invoke-Build -Configuration Release ${{ github.event_name == 'merge_group' && 'TestFull' || 'Test' }}
 
       - name: Test with daily
         if: ${{ github.event_name == 'schedule' }}
         shell: pwsh
-        run: ./pwsh/tools/install-powershell.ps1 -Daily && Invoke-Build TestE2EDaily
+        run: ./pwsh/tools/install-powershell.ps1 -Daily && Invoke-Build -Configuration Release TestE2EDaily
 
       - name: Upload build artifacts
         if: always()

.vsts-ci/azure-pipelines-ci.yml

@@ -1,11 +1,8 @@
 name: CI-$(Build.SourceBranchName)-$(Date:yyyyMMdd)$(Rev:.rr)
 
+# NOTE: This was superceded by the GitHub Actions workflow.
 pr: none
-
-trigger:
-  branches:
-    include:
-      - release
+trigger: none
 
 variables:
   # Don't download unneeded packages