release: 3.22.0 (#344)

* feat: [STG-2090] Add Azure Entra model auth support

* fix(internal): resolve build failures

* feat(stlc): configurable CI runner and private-production-repo support in workflow templates

* feat(server-v3): expose OpenAI endpoint format

* release: 3.22.0

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Co-authored-by: stainless-app[bot] <142633134+stainless-app[bot]@users.noreply.github.com>