Fix license compliance spec loading issue

What does this MR do?

Fixes a transient error in the license compliance spec by waiting for the (newer) loading icon to disappear after expanding a section.

Also fixes an excessive wait in the select2 component.

Closes #37980 (closed)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content