increase windows build test sharding, revert timeout 30 mins (#136474)

In https://github.com/flutter/flutter/pull/136300 I increased the timeout. This is a revert of that, which also adds an additional shard.

.ci.yaml

@@ -4515,9 +4515,10 @@ targets:
       - bin/**
       - .ci.yaml
 
-  - name: Windows build_tests_1_5
+  - name: Windows build_tests_1_6
     recipe: flutter/flutter_drone
     timeout: 60
+    bringup: true
     properties:
       add_recipes_cq: "true"
       dependencies: >-
@@ -4529,14 +4530,14 @@ targets:
           {"dependency": "vs_build", "version": "version:vs2019"}
         ]
       shard: build_tests
-      subshard: "1_5"
+      subshard: "1_6"
       tags: >
         ["framework", "hostonly", "shard", "windows"]
-      test_timeout_secs: "3600" # 1 hour
 
-  - name: Windows build_tests_2_5
+  - name: Windows build_tests_2_6
     recipe: flutter/flutter_drone
     timeout: 60
+    bringup: true
     properties:
       add_recipes_cq: "true"
       dependencies: >-
@@ -4548,14 +4549,14 @@ targets:
           {"dependency": "vs_build", "version": "version:vs2019"}
         ]
       shard: build_tests
-      subshard: "2_5"
+      subshard: "2_6"
       tags: >
         ["framework", "hostonly", "shard", "windows"]
-      test_timeout_secs: "3600" # 1 hour
 
-  - name: Windows build_tests_3_5
+  - name: Windows build_tests_3_6
     recipe: flutter/flutter_drone
     timeout: 60
+    bringup: true
     properties:
       add_recipes_cq: "true"
       dependencies: >-
@@ -4567,14 +4568,14 @@ targets:
           {"dependency": "vs_build", "version": "version:vs2019"}
         ]
       shard: build_tests
-      subshard: "3_5"
+      subshard: "3_6"
       tags: >
         ["framework", "hostonly", "shard", "windows"]
-      test_timeout_secs: "3600" # 1 hour
 
-  - name: Windows build_tests_4_5
+  - name: Windows build_tests_4_6
     recipe: flutter/flutter_drone
     timeout: 60
+    bringup: true
     properties:
       add_recipes_cq: "true"
       dependencies: >-
@@ -4586,14 +4587,14 @@ targets:
           {"dependency": "vs_build", "version": "version:vs2019"}
         ]
       shard: build_tests
-      subshard: "4_5"
+      subshard: "4_6"
       tags: >
         ["framework", "hostonly", "shard", "windows"]
-      test_timeout_secs: "3600" # 1 hour
 
-  - name: Windows build_tests_5_5
+  - name: Windows build_tests_5_6
     recipe: flutter/flutter_drone
     timeout: 60
+    bringup: true
     properties:
       add_recipes_cq: "true"
       dependencies: >-
@@ -4605,10 +4606,28 @@ targets:
           {"dependency": "vs_build", "version": "version:vs2019"}
         ]
       shard: build_tests
-      subshard: "5_5"
+      subshard: "5_6"
+      tags: >
+        ["framework", "hostonly", "shard", "windows"]
+
+  - name: Windows build_tests_6_6
+    recipe: flutter/flutter_drone
+    timeout: 60
+    bringup: true
+    properties:
+      add_recipes_cq: "true"
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:33v6"},
+          {"dependency": "chrome_and_driver", "version": "version:118.0.5993.70"},
+          {"dependency": "open_jdk", "version": "version:17"},
+          {"dependency": "goldctl", "version": "git_revision:f808dcff91b221ae313e540c09d79696cd08b8de"},
+          {"dependency": "vs_build", "version": "version:vs2019"}
+        ]
+      shard: build_tests
+      subshard: "6_6"
       tags: >
         ["framework", "hostonly", "shard", "windows"]
-      test_timeout_secs: "3600" # 1 hour
 
   - name: Windows customer_testing
     enabled_branches: