fix(pdk): inspect should log at notice level

[Tieske]

Summary

The inspect facility is used a lot for troubleshooting, but currently requires debug level logs to be enabled, which will cause a lot of noise. Also: the documentation still mentions inspect to log at notice level. So this fix aligns the code to the documentation.

Checklist

• The Pull Request has tests
• A changelog file has been created under changelog/unreleased/kong or skip-changelog label added on PR if changelog is unnecessary. README.md
• There is a user-facing docs PR against https://github.com/Kong/docs.konghq.com - PUT DOCS PR HERE

Issue reference

• FTI-6215
• Reverts chore(pdk) update kong.log.inspect #7815

[outsinre]

LGTM though no tests.

[team-gateway-bot]

Cherry-pick failed for master, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git remote add upstream https://github.com/kong/kong-ee
git fetch upstream master
git worktree add -d .worktree/cherry-pick-13642-to-master-to-upstream upstream/master
cd .worktree/cherry-pick-13642-to-master-to-upstream
git checkout -b cherry-pick-13642-to-master-to-upstream
ancref=$(git merge-base 1989ea7091b3cb191a6eeea6928f2493d798cefb 116c20dd6be181ca2def6099d42e2ba63e645803)
git cherry-pick -x $ancref..116c20dd6be181ca2def6099d42e2ba63e645803

[bungle]

EE cherry can be found here: https://github.com/Kong/kong-ee/pull/10224