Add back build cache, which will use the nightly build one (#42106)

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## Summary of the Pull Request
Related to this PR https://github.com/microsoft/PowerToys/pull/41968.
Now, we can enabled back the ci build with the nightly build cache (Just
kick off one today, and it will run periodically daily).

.pipelines/v2/ci.yml

@@ -32,7 +32,7 @@ parameters:
   - name: enableMsBuildCaching
     type: boolean
     displayName: "Enable MSBuild Caching"
-    default: false
+    default: true
   - name: runTests
     type: boolean
     displayName: "Run Tests"