Fail loudly with verbose logs when failing to download dart sdk. (flutter/engine#30093)

* Fail loudly with verbose logs when failing to download dart sdk.

Bug: https://github.com/flutter/flutter/issues/94492

* Add jazzy property to mac builders.

DEPS

@@ -719,6 +719,8 @@ hooks = [
     'action': [
       'python3',
       'src/flutter/tools/download_dart_sdk.py',
+      '--fail-loudly',
+      '--verbose',
     ]
   },
   {

engine/src/flutter/.ci.yaml

@@ -249,6 +249,7 @@ targets:
       android_sdk_license: \n24333f8a63b6825ea9c5514f83c2829b004d1fee
       android_sdk_preview_license: \n84831b9409646a918e30573bab4c9c91346d8abd
       build_android_aot: "true"
+      jazzy_version: 0.9.5
     timeout: 60
     scheduler: luci
 
@@ -257,6 +258,7 @@ targets:
     properties:
       add_recipes_cq: "true"
       build_host: "true"
+      jazzy_version: 0.9.5
     timeout: 75
     scheduler: luci