fix: evaluate lazy values in normal log formatters when level is debug

[kjellwinblad]

Fixes: https://emqx.atlassian.net/browse/EMQX-12380

Release version: v/e5.?

Summary

PR Checklist

Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:

• [x] Added tests for the changes
• [] Added property-based tests for code which performs user input validation
• [] Changed lines covered in coverage report
• [] Change log has been added to changes/(ce|ee)/(feat|perf|fix|breaking)-<PR-id>.en.md files
• [x] For internal contributor: there is a jira ticket to track this change
• [] Created PR to emqx-docs if documentation update is required, or link to a follow-up jira ticket
• [] Schema changes are backward compatible