Upgrade Golang to 1.25.8 to resolve known Vulnerabilities
<!--
These are the steps we should follow when we want to bump the golang version
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### Steps
1. [ ] bump golang in [goargs](https://gitlab.com/gitlab-org/language-tools/go/linters/goargs)
example MR:
- https://gitlab.com/gitlab-org/language-tools/go/linters/goargs/-/merge_requests/8
1. [ ] bump golang in [runner-linters](https://gitlab.com/gitlab-org/ci-cd/runner-tools/runner-linters)
example MR:
- https://gitlab.com/gitlab-org/ci-cd/runner-tools/runner-linters/-/merge_requests/7
1. [ ] bump golang et al in [gitlab-runner](https://gitlab.com/gitlab-org/gitlab-runner)
Things we want to bump:
- the golang version itself
- the version of the runner-linters image
- Update `GO_FIPS_VERSION_SUFFIX`, get the suffix from [here](https://github.com/golang-fips/go/releases)
- Poke some files to force rebuild of images:
```
find . -name '*.rebuild' | xargs -r -n1 "$SHELL" -c 'date -u > "$1"' --
```
example MRs:
- https://gitlab.com/gitlab-org/gitlab-runner/-/merge_requests/4838/
- https://gitlab.com/gitlab-org/gitlab-runner/-/merge_requests/3889
issue