[SPARK-39538] Convert CaseInsensitiveStringMap#logger to static

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.4.0
• Component/s: SQL
• Assignee: Cheng Pan
• Reporter: Cheng Pan
• Created: 21/Jun/22 01:41
• Updated: 24/Nov/22 00:38
• Resolved: 22/Jun/22 23:40

Issue Links

• links to: [Github] Pull Request #36930 (pan3793)