[MINOR] Fix sensitive data trimming from exceptions

[mukkachaitanya]

Problem

1266 added a feature to trim sensitive data, but it missed hadling individual exceptions and only handled Nested

Solution

Trim sensitive data before iterating over the individual exceptions

Does this solution apply anywhere else?

• [ ] yes
• [ ] no

If yes, where?

Test Strategy

Testing done:

• [ ] Unit tests
• [ ] Integration tests
• [ ] System tests
• [ ] Manual tests

Release Plan

[ManasjyotiSharma]

LGTM @mukkachaitanya. Left one minor comment.