Update pipelines for release testing (#431)

Author: bachuv

eng/ci/code-mirror.yml

@@ -4,6 +4,7 @@ trigger:
     # These are the branches we'll mirror to our internal ADO instance
     # Keep this set limited as appropriate (don't mirror individual user branches).
     - main
+    - vabachu/release-testing
 
 resources:
   repositories:
@@ -16,4 +17,4 @@ variables:
   - template: ci/variables/cfs.yml@eng
 
 extends:
-  template: ci/code-mirror.yml@eng
+  template: ci/code-mirror.yml@eng

eng/ci/official-build.yml

@@ -12,6 +12,7 @@ trigger:
     branches:
         include:
             - main
+            - vabachu/release-testing
 
 # CI only, does not trigger on PRs.
 pr: none
@@ -50,4 +51,4 @@ extends:
             - stage: BuildAndSign
               dependsOn: []
               jobs:
-                  - template: /eng/templates/build.yml@self
+                  - template: /eng/templates/build.yml@self