chore: mark v0.15.0

chore: mark v0.14.0 (microsoft#1918)

Note: this is a PR to be merged into the `release-0.14` branch.

Once this is merged to the branch:
- all test bots should kick in and run tests for this commit
- `publish_canary.yml` will kick in and publish `0.14.0-next.XXXX` version that can be tested manually

Once testing is complete:
- If we are **satisfied** with the results, we can publish github release against this commit.
Once release is published, the `0.14.0` will be published by `publish_release.yml` workflow.
- if we are **not satisfied**, then we can either cherry-pick fixes into the branch, or re-create branch from a nicer point.

chore: mark version v0.13.0 (microsoft#1720)

chore: mark version v0.12.1 (microsoft#1515)

chore: mark version v0.12.0 (microsoft#1497)

chore: mark v0.11.1 (microsoft#1025)

chore: mark version 0.11.0 (microsoft#1000)

chore: mark version 0.10.0 (microsoft#795)