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## Summary
Sometimes even if Vite Envrionment API is available, some plugins are
still override `config.createResolver` function to inject own aliases
Since technically `config.createResolver` was only [properly
deprecated](https://github.com/vitejs/vite/pull/20031) in Vite 7.0.0,
it's still a valid(-ish) to do so, even if it wasn't ever officially
supported
Vite already handles this in its internal css resolvers, but not exposes
the code to do so as part of public API, so I've copied and adapted it
Fixes#19677
## Test plan
Tested by copying built package into my repro from the issue, also ran
vite integration tests
---------
Co-authored-by: Robin Malfait <malfait.robin@gmail.com>
bc6e4b85bf