mark Mac tool_integration_tests_* as non-bringup (flutter#152412)

Follow-up to flutter#152399

Author: andrewkolos

.ci.yaml

@@ -4056,7 +4056,6 @@ targets:
       - .ci.yaml
 
   - name: Mac tool_integration_tests_1_5
-    bringup: true
     recipe: flutter/flutter_drone
     timeout: 60
     # Flake rate of >2.5% in presubmit
@@ -4083,7 +4082,6 @@ targets:
       - .ci.yaml
 
   - name: Mac tool_integration_tests_2_5
-    bringup: true
     recipe: flutter/flutter_drone
     timeout: 60
     properties:
@@ -4108,7 +4106,6 @@ targets:
       - .ci.yaml
 
   - name: Mac tool_integration_tests_3_5
-    bringup: true
     recipe: flutter/flutter_drone
     timeout: 60
     properties:
@@ -4133,7 +4130,6 @@ targets:
       - .ci.yaml
 
   - name: Mac tool_integration_tests_4_5
-    bringup: true
     recipe: flutter/flutter_drone
     timeout: 60
     properties:
@@ -4158,7 +4154,6 @@ targets:
       - .ci.yaml
 
   - name: Mac tool_integration_tests_5_5
-    bringup: true
     recipe: flutter/flutter_drone
     timeout: 60
     properties: