deps(ci): disable sccache-cache for rust action

[goldmedal]

This change has been tested by #1161

Disable sccache

Disabled sccache because of the following CI error.

sccache: error: Server startup failed: cache storage failed to read: Unexpected (permanent) at read => {"$id":"1","innerException":null,"message":"This legacy service is shutting down, effective April 15, 2025. Migrate to the new service ASAP. For more information: https://gh.io/gha-cache-sunset","typeName":"Microsoft.Azure.DevOps.ArtifactCache.WebApi.ArtifactCacheServiceDecommissionedException, Microsoft.Azure.DevOps.ArtifactCache.WebApi","typeKey":"ArtifactCacheServiceDecommissionedException","errorCode":0,"eventId":3000}

Summary by CodeRabbit

• Chores
  • Removed sccache caching integration and related environment variables from the Rust runtime setup.
  • Updated environment configuration by retaining only essential variables for debugging.
  • Cleaned up comments related to debug settings.

[coderabbitai]

Walkthrough

The configuration for the Rust runtime setup GitHub Action was updated to remove the use of the mozilla-actions/sccache-action@v0.0.4 step, which previously enabled sccache-based caching. Associated environment variables for sccache were also deleted. The environment now only sets variables related to backtraces and debug information. Comments explaining debug info and profile settings were removed, but no changes were made to public or exported entities.

Changes

File(s)	Change Summary
.github/actions/rust/setup-rust-runtime/action.yaml	Removed sccache step and associated environment variables; deleted comments about debug/profile.

Poem

In the warren where Rust builds run,
The sccache burrow is now undone.
Simpler paths for hares to hop,
With less to cache and less to swap.
Debug flags remain, crisp and clear,
As the code hops forward, year by year! 🐇

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Reviewing files that changed from the base of the PR and between 057d790 and 4c7ebd4.

📒 Files selected for processing (1)

• .github/actions/rust/setup-rust-runtime/action.yaml (0 hunks)

💤 Files with no reviewable changes (1)

• .github/actions/rust/setup-rust-runtime/action.yaml

⏰ Context from checks skipped due to timeout of 90000ms (2)

• GitHub Check: validate-pull-request-title
• GitHub Check: ci

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[douenergy]

Thanks @goldmedal !