Remove bringup from win arm64 builds. (#143548)

The Windows arm64 builds were all moved to bringup because new test beds not properly provisioned were added to the production pool.

Those new test beds are now fully validated but still running on staging pool to ensure they are not introducing noise in the prod pools.

Bug: https://github.com/flutter/flutter/issues/143180

.ci.yaml

@@ -5215,7 +5215,6 @@ targets:
 
   - name: Windows_arm64 hot_mode_dev_cycle_win_target__benchmark
     recipe: devicelab/devicelab_drone
-    bringup: true
     presubmit: false
     timeout: 60
     properties:
@@ -5299,7 +5298,6 @@ targets:
 
   - name: Windows_arm64 platform_channel_sample_test_windows
     recipe: devicelab/devicelab_drone
-    bringup: true
     presubmit: false
     timeout: 60
     properties:
@@ -5368,7 +5366,6 @@ targets:
 
   - name: Windows_arm64 plugin_test_windows
     recipe: devicelab/devicelab_drone
-    bringup: true
     presubmit: false
     timeout: 60
     properties:
@@ -5406,7 +5403,6 @@ targets:
   - name: Windows_arm64 run_debug_test_windows
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       dependencies: >-
@@ -5443,7 +5439,6 @@ targets:
   - name: Windows_arm64 run_release_test_windows
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       dependencies: >-
@@ -5700,7 +5695,6 @@ targets:
 
   - name: Windows_arm64 windows_home_scroll_perf__timeline_summary
     recipe: devicelab/devicelab_drone
-    bringup: true
     presubmit: false
     timeout: 60
     properties:
@@ -5728,7 +5722,6 @@ targets:
 
   - name: Windows_arm64 hello_world_win_desktop__compile
     recipe: devicelab/devicelab_drone
-    bringup: true
     presubmit: false
     timeout: 60
     properties:
@@ -5756,7 +5749,6 @@ targets:
   - name: Windows_arm64 flutter_gallery_win_desktop__compile
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >
@@ -5783,7 +5775,6 @@ targets:
   - name: Windows_arm64 flutter_gallery_win_desktop__start_up
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >
@@ -5810,7 +5801,6 @@ targets:
   - name: Windows_arm64 complex_layout_win_desktop__start_up
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >
@@ -5837,7 +5827,6 @@ targets:
   - name: Windows_arm64 flutter_view_win_desktop__start_up
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >
@@ -5864,7 +5853,6 @@ targets:
   - name: Windows_arm64 platform_view_win_desktop__start_up
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >
@@ -5974,7 +5962,6 @@ targets:
   - name: Windows_arm64 windows_startup_test
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       dependencies: >-
@@ -5997,7 +5984,6 @@ targets:
   - name: Windows_arm64 flutter_tool_startup__windows
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >