fix: don't display divider for API Keys menu item when API key is disabled

[vrajashkr]

What type of PR is this?
bug

Which issue does this PR fix:
Closes #424

What does this PR do / Why do we need it:
This PR fixes a bug where 2 horizontal lines show up in the User Account menu when the API key setting is disabled.

Testing done on this change:
With API keys disabled:

With API keys enabled:

Automation added to e2e:
N/A

Will this break upgrades or downgrades. Has updating a running cluster been tested?:
Not expected to break upgrades or downgrades. Not tested on a cluster.

Does this change require updates to the CNI daemonset config files to work?:
None

Does this PR introduce any user-facing change?:
No

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.35%. Comparing base (09ab447) to head (98f5a43).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #433      +/-   ##
==========================================
+ Coverage   82.70%   83.35%   +0.65%     
==========================================
  Files          63       63              
  Lines        1885     1887       +2     
  Branches      485      498      +13     
==========================================
+ Hits         1559     1573      +14     
+ Misses        315      303      -12     
  Partials       11       11              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[andaaron]

Thank you!