Revert "Move docs_test and docs_publish to bringup (#147645)" (#147928)

## Description

This reverts commit cb2197e to move `docs_test` and `docs_publish` back to normal mode after being fixed.

## Related Issues
 - flutter/flutter#147609
 - flutter/flutter#147645

.ci.yaml

@@ -449,7 +449,6 @@ targets:
 
   - name: Linux docs_publish
     recipe: flutter/docs
-    bringup: true # https://github.com/flutter/flutter/issues/147609
     presubmit: false
     timeout: 60
     dimensions:
@@ -474,7 +473,6 @@ targets:
 
   - name: Linux docs_test
     recipe: flutter/flutter_drone
-    bringup: true # https://github.com/flutter/flutter/issues/147609
     timeout: 90 # https://github.com/flutter/flutter/issues/120901
     properties:
       cores: "32"