Updated version mapping and post-release step (#4191)

Author: kamaljeeti

docs/governance/templates/release_issue.md

@@ -70,7 +70,9 @@ and copy it into a release issue. Fill in relevant values, found inside {}
   - [ ] Within the shell `cd` to the `test/sdk/go/` directory and run `make cloud-build`.
 - [ ] In `test/upgrade/Makefile` change `base_version` to `{version}+1`.
 - [ ] Update `cloudbuild.yaml` by incrementing the `_BASE_VERSION` to `{version}+1`. 
-- [ ] In `test/upgrade/versionMap.yaml` change `ReleaseVersion` to `{version}`.
+- [ ] Verify and update Kubernetes version support and Agones version mappings in `test/upgrade/versionMap.yaml`.
+  - [ ] Update ReleaseVersion to the current release `{version}`.
+  - [ ] Ensure that the Kubernetes versions supported by the release are correctly listed in the k8sToAgonesVersions map, including the new release version `{version}` and the "Dev" label where appropriate.
   - [ ] In `test/upgrade/versionMap.yaml` copy and paste `“Dev”` in `agonesVersionFeatureGates` map.
   - [ ] Change one of the `“Dev”` in `agonesVersionFeatureGates` to `{version}`.
 - [ ] Create PR with these changes, and merge them with approval

test/upgrade/versionMap.yaml

@@ -23,25 +23,14 @@ data:
   version-mappings.json: |
     {
       "k8sToAgonesVersions": {
-        "1.29": [
-          "1.40.0",
-          "1.41.0",
-          "1.42.0",
-          "1.43.0",
-          "1.44.0",
-          "1.45.0",
-          "1.46.0",
-          "1.47.0",
-          "1.48.0",
-          "Dev"
-        ],
         "1.30": [
           "1.43.0",
           "1.44.0",
           "1.45.0",
           "1.46.0",
           "1.47.0",
           "1.48.0",
+          "1.49.0",
           "Dev"
         ],
         "1.31": [
@@ -50,9 +39,12 @@ data:
           "1.46.0",
           "1.47.0",
           "1.48.0",
+          "1.49.0",
           "Dev"
         ],
         "1.32": [
+          "1.48.0",
+          "1.49.0",
           "Dev"
         ]
       },