chore(deps): bump the kube group across 1 directory with 2 updates

Bumps the kube group with 2 updates in the /backend directory: [k8s-openapi](https://github.com/Arnavion/k8s-openapi) and [kube](https://github.com/kube-rs/kube).


Updates `k8s-openapi` from 0.26.1 to 0.27.1
- [Release notes](https://github.com/Arnavion/k8s-openapi/releases)
- [Changelog](https://github.com/Arnavion/k8s-openapi/blob/master/CHANGELOG.md)
- [Commits](Arnavion/k8s-openapi@v0.26.1...v0.27.1)

Updates `kube` from 2.0.1 to 3.1.0
- [Release notes](https://github.com/kube-rs/kube/releases)
- [Changelog](https://github.com/kube-rs/kube/blob/main/CHANGELOG.md)
- [Commits](kube-rs/kube@2.0.1...3.1.0)

---
updated-dependencies:
- dependency-name: k8s-openapi
  dependency-version: 0.27.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: kube
- dependency-name: kube
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: kube
...

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

Author: dependabot[bot]

backend/Cargo.lock

@@ -44,8 +44,8 @@ tokio = { version = "1.48.0", features = [
 ] }
 tracing-subscriber = { version = "0.3.20" }
 url = { version = "2.5.4" }
-k8s-openapi = { version = "0.26.0", features = ["latest"] }
-kube = { version = "2.0.1", features = ["runtime", "derive"] }
+k8s-openapi = { version = "0.27.1", features = ["latest"] }
+kube = { version = "3.1.0", features = ["runtime", "derive"] }
 openidconnect = "4.0.1"
 opentelemetry = { version = "0.31.0" }
 opentelemetry_sdk = { version = "0.31.0", features = ["rt-tokio"] }