Remove remaining OS_CONF_RELEASE_PATH usage on ubuntu-jammy branch

[coderabbitai]

Summary

A follow-up fix is needed on the ubuntu-jammy branch to finish the transition away from OS_CONF_RELEASE_PATH and consistently use BPM_RELEASE_PATH.

Context

PR #678 updated acceptance-tests/ipv4director/smoke/smoke_suite_test.go to upload the BPM release instead of the OS config release, but other related references still remain and should be cleaned up on the ubuntu-jammy branch as part of the merge-forward workflow.

Requested by: @aramprice

Affected areas

• acceptance-tests/ipv4director/auditd/smoke_suite_test.go
• ci/tasks/test-stemcell.sh

Required changes

• Update the auditd smoke suite to read BPM_RELEASE_PATH instead of OS_CONF_RELEASE_PATH.
• Remove the legacy OS_CONF_RELEASE_PATH export from the test-stemcell task if it is no longer needed.
• Keep the release upload/setup flow aligned across the acceptance test suites.

Rationale

The current PR switched one smoke suite over to BPM, but leaving the older OS_CONF_RELEASE_PATH references behind creates inconsistent setup behavior and leaves a retired variable in circulation.

Acceptance criteria

• No remaining required usage of OS_CONF_RELEASE_PATH in the acceptance test setup for this flow on ubuntu-jammy.
• The auditd smoke suite uses BPM_RELEASE_PATH.
• ci/tasks/test-stemcell.sh no longer exports the legacy OS config release path for this scenario.
• The issue is fixed on ubuntu-jammy so it can merge forward cleanly.

Backlinks

• PR: jammy => noble #678
• Review comment: jammy => noble #678 (comment)

[aramprice]

I'm not sure if the rabbit's analysis is correct but I thought maybe it was worth a second or third set of eyes.

[neddp]

Hi @aramprice,

I think the rabbit has confused the clean up with a replacement. os_conf was just unused in the particular test suite, I didn't replace it with BPM. We can see that it is still being used for the auditd suite -

bosh-linux-stemcell-builder/acceptance-tests/ipv4director/auditd/smoke_test.go

Line 25 in 78afc22

"ssh", "os-conf-auditd/0", "-r", "-c",

[aramprice]

Going to close this on account of the confused rabbit.