Revert "[release/8.0.1xx] Stop building source-build in non-1xx branc… (#20640)

Author: NikolaMilosavljevic

.vsts-ci.yml

@@ -330,6 +330,11 @@ extends:
             buildArchitecture: arm64
             runTests: false
 
+      # Source Build
+      - template: /eng/common/templates-official/jobs/source-build.yml@self
+        parameters:
+          enableInternalSources: true
+
     - ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
       - stage: Publish
         dependsOn:

.vsts-pr.yml

@@ -340,6 +340,10 @@ stages:
         linuxPortable: true
         runTests: false
 
+  - template: /eng/common/templates/jobs/source-build.yml
+    parameters:
+      enableInternalSources: true
+
 - ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
   - stage: Publish
     dependsOn: