PR information is discarded when using --from-context

[weichweich]

Is there an existing issue for this?

• I have searched the existing issues

Description of the bug

When providing a custom context and having a repo configured, the PRs that belong to a commit are still queried and potentially overwrite custom information from the provided context with from-context.

Not providing the repo information is also not an option since the owner and repo would be missing in templates.

Steps To Reproduce

1. Create a context without PR information using git-cliff --context context.json
2. Add PR information manually
3. Build changelog with git-cliff --from-context context.json --gitlab-repo owner/repo

Expected behavior

The context isn't changed when using --from-context.

Screenshots / Logs

No response

Software information

• Project version: 2.5

Additional context

No response

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