Auto merge of #29615 - servo:fix-nightly-build, r=mrobinson

Pass S3 secrets for nightly builds and fix windows build

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Secrets need to be passed to reusable workflows either by name or by `secrets: inherit` from the caller workflow. The latter allows accessing all secrets in scope.

Windows build has a bug where the upload-nightly command is not run from the correct working directory.

[This manual build](https://github.com/servo/servo/actions/runs/4665552398) based on this branch has passed and the binaries have also been updated in servo.org for today.

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #29614

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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because it fixes bug in CI configuration.

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