What does this PR do?

Bumps github.com/klauspost/compress from v1.18.4/v1.18.5 to v1.18.6 across all modules in the repo (root + contribs + tools + workflows).

Motivation

Upstream v1.18.6 ships the fix for klauspost/compress#1097 — "s2: Fix amd64 stack frame corruption" — which was causing SIGSEGV crashes inside s2.Decode (observed in franz-go based Kafka consumers). Since our contrib/twmb/franz-go integration sits on the same decode path, we want the fix picked up across the workspace.

No API changes; this is a patch release.

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• System-Tests covering this feature have been added and enabled with the va.b.c-dev version tag.
• There is a benchmark for any new code, or changes to existing code.
• If this interacts with the agent in a new way, a system test has been added.
• [] New code is free of linting errors. You can check this by running make lint locally.
• [] New code doesn't break existing tests. You can check this by running make test locally.
• Add an appropriate team label so this PR gets put in the right place for the release notes.
• [] All generated files are up to date. You can check this by running make generate locally.
• Non-trivial go.mod changes, e.g. adding new modules, are reviewed by @DataDog/dd-trace-go-guild. Make sure all nested modules are up to date by running make fix-modules locally.