chore(deps): bump google/cloud-sdk in /support (#5220)

Bumps google/cloud-sdk from 448.0.0-alpine to 449.0.0-alpine.

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

support/alpine.Dockerfile

@@ -99,7 +99,7 @@ COPY --chown=$USER:root --from=aws-builder /usr/bin/aws-iam-authenticator /usr/b
 #
 # gcloud base
 #
-FROM google/cloud-sdk:448.0.0-alpine@sha256:28724c69e488f0d36869e7d98d4c7f8ed05aa62e9ff0a690437179ea4b462a65 as gcloud-base
+FROM google/cloud-sdk:449.0.0-alpine@sha256:6c33ba78fdbb78f53dd7d263f57db28afd383981d244e1a20e78ff6c3cbec43c as gcloud-base
 
 RUN gcloud components install kubectl gke-gcloud-auth-plugin --quiet