fix(cinder): enable native Ceph image copies

[Mohammed Naser (mnaser)]

Summary

• stop setting image_conversion_disable=true in Cinder
• allow the downstream Cinder implementation to use native Ceph-to-Ceph copies
• add a release note

Validation

• git diff --check
• release note parsing completed; Reno only reported the repository's existing duplicate release-note UID
• pre-commit whitespace and line-ending checks passed
• Ansible lint traversed the repository and only failed on the existing galaxy[no-changelog] finding in galaxy.yml

[Mohammed Naser (mnaser)]

Verified the exact Cinder image digests pinned on every supported Atmosphere branch. The installed cinder/volume/drivers/rbd.py in each image contains the downstream direct_dest RBD path:

• main: sha256:f2ae235bfa31fa639d481f551a25e9844efe528acb59a8c2095c5ece25b7f0eb
• stable/2025.2: sha256:d970d787b54c2517b40e5b917724f84f7009973cd36d03af45d5871329d6f376
• stable/2025.1: sha256:34bff27b928f1728d7146b97b775dfc7fb060a90e854619a203deb4b030d6c48
• stable/2024.2: sha256:5a17efa0d130f4664bfbc9ced2d100ecfec78e2cf48b147ce9ac62e56cec15d3
• stable/2024.1: sha256:fbe2a56336e13026a1e125ee732746ad4e22d104be8dc6510204737264449144
• stable/2023.2: sha256:41bf4d4750f23d549d2d94a2c4753c162ba9b186597de0cb45c5a9e9478ba1c8
• stable/2023.1: sha256:6acce7d4ebbb8492aadecd7d7eed810dd9ca9d4d5e6dc901720b84c637c9e977
• stable/zed: sha256:9d76dc882669c2347b49629bb1a8ce6d0e51cc1de1d66b8b34f192a41c3e8b38

The backport labels for all seven stable branches are now applied.

[vexxhost-bot]

Successfully created backport PR for stable/zed:

• [Backport stable/zed] fix(cinder): enable native Ceph image copies #4348

[vexxhost-bot]

Successfully created backport PR for stable/2023.1:

• [Backport stable/2023.1] fix(cinder): enable native Ceph image copies #4349

[vexxhost-bot]

Successfully created backport PR for stable/2023.2:

• [Backport stable/2023.2] fix(cinder): enable native Ceph image copies #4350

[vexxhost-bot]

Successfully created backport PR for stable/2024.1:

• [Backport stable/2024.1] fix(cinder): enable native Ceph image copies #4351

[vexxhost-bot]

Successfully created backport PR for stable/2024.2:

• [Backport stable/2024.2] fix(cinder): enable native Ceph image copies #4352

[vexxhost-bot]

Successfully created backport PR for stable/2025.1:

• [Backport stable/2025.1] fix(cinder): enable native Ceph image copies #4353

[vexxhost-bot]

Successfully created backport PR for stable/2025.2:

• [Backport stable/2025.2] fix(cinder): enable native Ceph image copies #4354