Remove bringup from builds. (#39605)

* Remove bringup from builds.

Windows arm, Linux Fuchsia FEMU and Linux Fuchsia FEMU arm64 have been
passing consistently.

* Set fuchsia back to bringup.

.ci.yaml

diff --git a/.ci.yaml b/.ci.yaml
index f8f0c0c..573bf39 100644
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -504,7 +504,6 @@
       config_name: windows_host_engine
 
   - name: Windows windows_arm_host_engine
-    bringup: true
     recipe: engine_v2/engine_v2
     timeout: 60
     properties: