Revert "Move Fuchsia FEMU to bringup due to flakes (#40321)"

This reverts commit ce7f41c658bec97a7b055c1712f2cf37f4ded114.

.ci.yaml

diff --git a/.ci.yaml b/.ci.yaml
index 902ad16..39844f9 100644
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -156,7 +156,6 @@
       emulator_arch: "x64"
       enable_cso: "true"
     timeout: 60
-    bringup: true
 
   - name: Linux Fuchsia arm64 FEMU
     recipe: engine/femu_test
@@ -169,7 +168,6 @@
       emulator_arch: "arm64"
       enable_cso: "true"
     timeout: 60
-    bringup: true
 
   - name: Linux Framework Smoke Tests
     recipe: engine/framework_smoke