fix(ci): opreator binary should not be prefixed with v

[emosbaugh]

What this PR does / why we need it:

airgap builds failing with error

failed to create embedded cluster bundle: failed to create artifacts archive: failed to get operator artifact: failed to download file https://replicated.app/embedded-cluster-public-files/operator-binaries/1.11.1+k8s-1.29.tar.gz, status code: 403

Which issue(s) this PR fixes:

Does this PR require a test?

Does this PR require a release note?

Does this PR require documentation?

[github-actions]

This PR has been released (on staging) and is available for download with a embedded-cluster-smoke-test-staging-app license ID.

Online Installer:

curl "https://staging.replicated.app/embedded/embedded-cluster-smoke-test-staging-app/ci/appver-dev-c5c0252" -H "Authorization: $EC_SMOKE_TEST_LICENSE_ID" -o embedded-cluster-smoke-test-staging-app-ci.tgz

Airgap Installer (may take a few minutes before the airgap bundle is built):

curl "https://staging.replicated.app/embedded/embedded-cluster-smoke-test-staging-app/ci-airgap/appver-dev-c5c0252?airgap=true" -H "Authorization: $EC_SMOKE_TEST_LICENSE_ID" -o embedded-cluster-smoke-test-staging-app-ci.tgz

Happy debugging!

[sgalsaleh]

Merging as this only affects release workflow.