build(deps): bump @google-cloud/container from 2.3.0 to 3.0.0

Bumps [@google-cloud/container](https://github.com/googleapis/nodejs-cloud-container) from 2.3.0 to 3.0.0.
- [Release notes](https://github.com/googleapis/nodejs-cloud-container/releases)
- [Changelog](https://github.com/googleapis/nodejs-cloud-container/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/nodejs-cloud-container/compare/v2.3.0...v3.0.0)

---
updated-dependencies:
- dependency-name: "@google-cloud/container"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

plugins/kubernetes-backend/package.json

@@ -40,7 +40,7 @@
     "@backstage/config": "^0.1.15",
     "@backstage/errors": "^0.2.2",
     "@backstage/plugin-kubernetes-common": "^0.2.7",
-    "@google-cloud/container": "^2.2.0",
+    "@google-cloud/container": "^3.0.0",
     "@kubernetes/client-node": "^0.16.0",
     "@types/express": "^4.17.6",
     "aws-sdk": "^2.840.0",