ci fix - hardcode kustomize download to bypass github api rate limits

[trdoyle81]

What type of PR is this?
/kind failing-test

What does this PR do / why we need it:
Fixes flaky OpenShift CI images job failures.

The install_kustomize.sh script queries the GitHub API to find the Kustomize release version. Due to shared CI IPs, GitHub frequently blocks this with a 403 API Rate Limit Exceeded error. The download silently fails, causing the tar command to crash the build. This PR replaces the script with a direct curl | tar download of the release tarball (matching how we install kubectl and argocd). This bypasses the GitHub API entirely and makes the CI build stable.

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

Which issue(s) this PR fixes:
Fixes # N/A

Test acceptance criteria:

• Unit Test
• E2E Test

How to test changes / Special notes to the reviewer:
podman build -t ci-test .
podman run --rm ci-test kustomize version

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