Don't emit deprecation warnings (coming from openapi-generated code)

### Motivation

```bash
/__w/penny-bot/penny-bot/Lambdas/GitHubAPI/GeneratedSources/Types.swift:2886:22: warning: 'hasDownloads' is deprecated
2884 | self.hasWiki = hasWiki
2885 | self.hasPages = hasPages
2886 | self.hasDownloads = hasDownloads
| `- warning: 'hasDownloads' is deprecated
2887 | self.hasDiscussions = hasDiscussions
2888 | self.archived = archived
/__w/penny-bot/penny-bot/Lambdas/GitHubAPI/GeneratedSources/Types.swift:2900:22: warning: 'useSquashPrTitleAsDefault' is deprecated
2898 | self.deleteBranchOnMerge = deleteBranchOnMerge
2899 | self.allowUpdateBranch = allowUpdateBranch
2900 | self.useSquashPrTitleAsDefault = useSquashPrTitleAsDefault
| `- warning: 'useSquashPrTitleAsDefault' is deprecated
2901 | self.squashMergeCommitTitle = squashMergeCommitTitle
2902 | self.squashMergeCommitMessage = squashMergeCommitMessage
/__w/penny-bot/penny-bot/Lambdas/GitHubAPI/GeneratedSources/Types.swift:2886:22: warning: 'hasDownloads' is deprecated
2884 | self.hasWiki = hasWiki
2885 | self.hasPages = hasPages
2886 | self.hasDownloads = hasDownloads
| `- warning: 'hasDownloads' is deprecated
2887 | self.hasDiscussions = hasDiscussions
2888 | self.archived = archived
/__w/penny-bot/penny-bot/Lambdas/GitHubAPI/GeneratedSources/Types.swift:2900:22: warning: 'useSquashPrTitleAsDefault' is deprecated
2898 | self.deleteBranchOnMerge = deleteBranchOnMerge
2899 | self.allowUpdateBranch = allowUpdateBranch
2900 | self.useSquashPrTitleAsDefault = useSquashPrTitleAsDefault
| `- warning: 'useSquashPrTitleAsDefault' is deprecated
2901 | self.squashMergeCommitTitle = squashMergeCommitTitle
2902 | self.squashMergeCommitMessage = squashMergeCommitMessage
/__w/penny-bot/penny-bot/Lambdas/GitHubAPI/GeneratedSources/Types.swift:2886:22: warning: 'hasDownloads' is deprecated
2884 | self.hasWiki = hasWiki
2885 | self.hasPages = hasPages
2886 | self.hasDownloads = hasDownloads
| `- warning: 'hasDownloads' is deprecated
2887 | self.hasDiscussions = hasDiscussions
2888 | self.archived = archived
/__w/penny-bot/penny-bot/Lambdas/GitHubAPI/GeneratedSources/Types.swift:2900:22: warning: 'useSquashPrTitleAsDefault' is deprecated
2898 | self.deleteBranchOnMerge = deleteBranchOnMerge
2899 | self.allowUpdateBranch = allowUpdateBranch
2900 | self.useSquashPrTitleAsDefault = useSquashPrTitleAsDefault
| `- warning: 'useSquashPrTitleAsDefault' is deprecated
2901 | self.squashMergeCommitTitle = squashMergeCommitTitle
2902 | self.squashMergeCommitMessage = squashMergeCommitMessage
```

### Proposed solution

I think we could have settings like "upgrade_deprecations_to_unavailabilities" or "don't_mark_as_deprecated_at_all".
Or maybe if we annotate the initializer with the deprecations as well, we can somehow manage not breaking users while also not emitting warnings? we might need 2 inits, one with all properties including deprecateds, and one with no deprecated parameters in it.

### Alternatives considered

Live with the warnings?

### Additional information

_No response_

Start by inspecting the generated initializer in Lambdas/GitHubAPI/GeneratedSources/Types.swift around lines 2886 and 2900, where the deprecation warnings occur. Trace how this generated code is configured, then define and verify a supported approach that avoids warnings for deprecated properties without breaking users who need them.

Written by the indexing model from the issue text.