Dependabot updates: remove 8.0 and add 9.0 (#8087)

Author: jander-msft

.github/dependabot.template.yml

@@ -18,9 +18,8 @@
 #@ def getBranches():
 #@   return [
 #@     struct.encode({"name": "main", "majorVersion": "8"}),
-#@     struct.encode({"name": "release/9.x", "majorVersion": "9"}),
+#@     struct.encode({"name": "release/9.0", "majorVersion": "9"}),
 #@     struct.encode({"name": "release/8.x", "majorVersion": "8"}),
-#@     struct.encode({"name": "release/8.0", "majorVersion": "8"}),
 #@   ]
 #@ end
 

.github/dependabot.yml

@@ -55,14 +55,14 @@ updates:
   directory: /eng/dependabot/independent
   schedule:
     interval: daily
-  target-branch: release/9.x
+  target-branch: release/9.0
   ignore:
   - dependency-name: Microsoft.Extensions.*
     update-types:
     - version-update:semver-major
   - dependency-name: Moq
   commit-message:
-    prefix: '[release/9.x] '
+    prefix: '[release/9.0] '
   groups:
     azure-sdk-dependencies:
       patterns:
@@ -77,20 +77,20 @@ updates:
   directory: /eng/dependabot/nuget.org
   schedule:
     interval: daily
-  target-branch: release/9.x
+  target-branch: release/9.0
   commit-message:
-    prefix: '[release/9.x] '
+    prefix: '[release/9.0] '
 - package-ecosystem: nuget
   directory: /eng/dependabot/net9.0
   schedule:
     interval: daily
-  target-branch: release/9.x
+  target-branch: release/9.0
   ignore:
   - dependency-name: '*'
     update-types:
     - version-update:semver-major
   commit-message:
-    prefix: '[release/9.x] '
+    prefix: '[release/9.0] '
   groups:
     runtime-dependencies:
       patterns:
@@ -101,13 +101,13 @@ updates:
   directory: /eng/dependabot/net8.0
   schedule:
     interval: daily
-  target-branch: release/9.x
+  target-branch: release/9.0
   ignore:
   - dependency-name: '*'
     update-types:
     - version-update:semver-major
   commit-message:
-    prefix: '[release/9.x] '
+    prefix: '[release/9.0] '
   groups:
     runtime-dependencies:
       patterns:
@@ -160,49 +160,3 @@ updates:
       - Microsoft.Extensions.*
       - Microsoft.NETCore.DotNetHost
       - System.Text.Json
-- package-ecosystem: nuget
-  directory: /eng/dependabot/independent
-  schedule:
-    interval: daily
-  target-branch: release/8.0
-  ignore:
-  - dependency-name: Microsoft.Extensions.*
-    update-types:
-    - version-update:semver-major
-  - dependency-name: Moq
-  commit-message:
-    prefix: '[release/8.0] '
-  groups:
-    azure-sdk-dependencies:
-      patterns:
-      - Azure.Core
-      - Azure.Identity
-      - Azure.Storage.*
-    identity-dependencies:
-      patterns:
-      - Microsoft.Identity.*
-      - Microsoft.IdentityModel.*
-- package-ecosystem: nuget
-  directory: /eng/dependabot/nuget.org
-  schedule:
-    interval: daily
-  target-branch: release/8.0
-  commit-message:
-    prefix: '[release/8.0] '
-- package-ecosystem: nuget
-  directory: /eng/dependabot/net8.0
-  schedule:
-    interval: daily
-  target-branch: release/8.0
-  ignore:
-  - dependency-name: '*'
-    update-types:
-    - version-update:semver-major
-  commit-message:
-    prefix: '[release/8.0] '
-  groups:
-    runtime-dependencies:
-      patterns:
-      - Microsoft.Extensions.*
-      - Microsoft.NETCore.DotNetHost
-      - System.Text.Json