[SPARK-56357][BUILD] Upgrade sbt to 1.12.8

[LuciferYang]

What changes were proposed in this pull request?

This pr aims to upgrade sbt from 1.12.4 to 1.12.8

Why are the changes needed?

Release note:

• https://github.com/sbt/sbt/releases/tag/v1.12.5
• https://github.com/sbt/sbt/releases/tag/v1.12.6
• https://github.com/sbt/sbt/releases/tag/v1.12.7
• https://github.com/sbt/sbt/releases/tag/v1.12.8

Does this PR introduce any user-facing change?

No

How was this patch tested?

• Pass Github Actions

Was this patch authored or co-authored using generative AI tooling?

No

[pan3793]

thanks, merged to master

[HyukjinKwon]

@LuciferYang I will revert this and see if this recovers https://github.com/apache/spark/actions/runs/24123784873/job/70383502927? I think it's related.

If not, I will revert the revert 👍

[HyukjinKwon]

OK seems it doesn't fix it. Let me revert the revert

[LuciferYang]

Thank you @HyukjinKwon

[pan3793]

at LuciferYang I will revert this and see if this recovers https://github.com/apache/spark/actions/runs/24123784873/job/70383502927? I think it's related.

If not, I will revert the revert 👍

@HyukjinKwon the root cause of failure should be

coursier has always been assuming that the repository that contains metadata (like POM files) also contains the JARs.

it's a known issue that happens on all sbt versions, see coursier/coursier#2942 for more details.

[HyukjinKwon]

Thanks!