refactor: replace interface{} with any (Go 1.18+)

[MD-Mushfiqur123]

Replace interface{} with any (available since Go 1.18) across 5 files:

• logger.go
• state_trace_nop.go
• raft_test.go
• node_util_test.go
• rafttest/interaction_env_logger.go

This project already requires Go 1.26 (see go.mod).

[k8s-ci-robot]

Hi @MD-Mushfiqur123. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[logica0419]

@MD-Mushfiqur123
Hi, thanks for the PR!

However, the DCO check is currently failing. This means the commit message does not include a Signed-off-by: line.
This line is important for long-term project maintenance. I'd appreciate your understanding.

Please follow the instructions provided in the DCO check log and update the commit accordingly.
I also recommend configuring Git to add a signed-off line to your commits automatically to help avoid DCO failures in the future.
https://github.com/etcd-io/raft/pull/451/checks?check_run_id=81293565436

Thank you!

[MD-Mushfiqur123]

DCO fixed. Squashed to single commit with proper sign-off.

[ahrtr]

/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, MD-Mushfiqur123

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• OWNERS [ahrtr]

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