Adding release_build:true to Mac builds. (#37478)

This will run the specified jobs under the release builder recipe in dart-internal.

Bug:b/232552448

Author: yusuf-goog

.ci.yaml

@@ -331,12 +331,14 @@ targets:
     recipe: engine_v2/engine_v2
     timeout: 60
     properties:
+      release_build: "true"
       config_name: mac_android_aot_engine
 
   - name: Mac mac_host_engine
     recipe: engine_v2/engine_v2
     timeout: 60
     properties:
+      release_build: "true"
       config_name: mac_host_engine
 
   - name: Mac Unopt
@@ -429,6 +431,7 @@ targets:
     recipe: engine_v2/engine_v2
     timeout: 60
     properties:
+      release_build: "true"
       config_name: mac_ios_engine
       dependencies: >-
         [
@@ -439,12 +442,14 @@ targets:
     recipe: engine_v2/engine_v2
     timeout: 60
     properties:
+      release_build: "true"
       config_name: mac_ios_engine_profile
 
   - name:  Mac mac_ios_engine_release
     recipe: engine_v2/engine_v2
     timeout: 60
     properties:
+      release_build: "true"
       config_name: mac_ios_engine_release
 
   - name: Windows Android AOT Engine