Update GITLAB_KAS_VERSION
What does this MR do and why?
Update kas version to the latest commit (https://gitlab.com/gitlab-org/cluster-integration/gitlab-agent/-/commits/master?ref_type=heads).
We need to test if CNG and Omnibus are ok with commit shas. We believe they are but we need to actually test that everything works as intended before %16.11 release. See release-tools!2860 (comment 1852169228) for more context.
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