Migrate Packaging Builders to .ci.yaml (flutter#115569)

* packaging builder initial config

* add release scheduler parameter

* remove stables

* add taskname + test owner

* testowner test

* comment structure

* test naming convention

* test adding tags

* add timeout

* prune names

* Update testowners.

* Move packaging to shards section.

* Set packaging as shard.

* Use packaging V2

Co-authored-by: godofredoc <godofredoc@google.com>

.ci.yaml

@@ -4630,6 +4630,58 @@ targets:
         ["devicelab", "hostonly", "mac"]
       task_name: flutter_tool_startup__macos
 
+  - name: Linux flutter_packaging_beta
+    recipe: packaging_v2/packaging_v2
+    timeout: 60
+    scheduler: release
+    bringup: true
+    enabled_branches:
+      - beta
+    properties:
+      task_name: flutter_packaging_beta
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+
+
+  - name: Mac flutter_packaging_beta
+    recipe: packaging_v2/packaging_v2
+    timeout: 60
+    scheduler: release
+    bringup: true
+    enabled_branches:
+      - beta
+    properties:
+      task_name: flutter_packaging_beta
+      tags: >
+        ["framework", "hostonly", "shard", "mac"]
+
+
+  - name: Mac_arm64 flutter_packaging_beta
+    recipe: packaging_v2/packaging_v2
+    timeout: 60
+    scheduler: release
+    bringup: true
+    enabled_branches:
+      - beta
+    properties:
+      task_name: flutter_packaging_beta
+      tags: >
+        ["framework", "hostonly", "shard", "mac"]
+
+
+  - name: Windows flutter_packaging_beta
+    recipe: packaging_v2/packaging_v2
+    timeout: 60
+    scheduler: release
+    bringup: true
+    enabled_branches:
+      - beta
+    properties:
+      task_name: flutter_packaging_beta
+      tags: >
+        ["framework", "hostonly", "shard", "windows"]
+
+
   # TODO(drewroengoogle): Remove this target when the release scheduler is
   # confirmed to be working correctly and as intended.
   # (https://github.com/flutter/flutter/issues/100806)

TESTOWNERS

@@ -302,3 +302,4 @@
 # skp_generator @Hixie
 # test_ownership @keyonghan
 # verify_binaries_codesigned @christopherfujino @flutter/releases
+# flutter_packaging_beta @godofredoc @flutter/infra