Add a log to indicate errors related to JWKS request in enforcer

[VirajSalaka]

Purpose

$subject as if some request authentication fails due to issue with JWKS endpoint call, it would be hard to debug.

Issues

Fixes #

Automation tests

• Unit tests added: No
• Integration tests added: No

Tested environments

Not Tested

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Maintainers: Check before merge

• [x] Assigned 'Type' label
• [x] Assigned the project
• [x] Validated respective github issues
• [x] Assigned milestone to the github issue(s)