build: Prepare for release 1.5.3

[kubewarden-auth-token-generator]

Bumped versions to prepare for a release with version 1.5.3.

Changes since last released tag: (if no tag, since HEAD^): v1.5.2...updatecli_main_release_pr

Note

Merging this PR will trigger a release of this policy.

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Open PR that prepares the policy for release

Update metadata.yml with new version

change detected: * key "$.annotations.'io.kubewarden.policy.version'" updated from "1.5.2" to "1.5.3", in file "metadata.yml"

GitHub Action workflow link

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[jvanz]

Considering the work in the policies monorepo. I would say that we should close this update until we release the policy there.