Switch to use Rust VSS server in CI

[tnull]

Since we just deprecated the Java version of the VSS server, we here switch our CI over to use the Rust version.

[ldk-reviews-bot]

👋 Thanks for assigning @tankyleo as a reviewer!
I'll wait for their review and will help manage the review process.
Once they submit their review, I'll check if a second reviewer would be helpful.

[tnull]

FWIW, the change here seems to work, but ofc our VSS CI job still generally hangs currently unfortunately.

[tankyleo]

FWIW, the change here seems to work, but ofc our VSS CI job still generally hangs currently unfortunately.

Thanks, I've noted this bug will look into it

[tnull]

FWIW, the change here seems to work, but ofc our VSS CI job still generally hangs currently unfortunately.

Thanks, I've noted this bug will look into it

Don't bother, I already had a few attempts into looking into it. Have finally reproduced it locally, hope to make progress tomorrow.