feat: hide my career tab behind feature flag

[jajjibhai008]

Description

JIRA -> ENT-8774

For all changes

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.79%. Comparing base (f5b08c3) to head (87b939c).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1076   +/-   ##
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  Coverage   84.79%   84.79%           
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  Files         393      393           
  Lines        8076     8076           
  Branches     1934     1934           
=======================================
  Hits         6848     6848           
  Misses       1171     1171           
  Partials       57       57           

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[adamstankiewicz]

[inform] Just a heads up, there is a prefetch of the learner skills API query used by the "My Career" tab, but it's not currently adhering to the FEATURE_ENABLE_MY_CAREER feature flag (source)

Do you think it's worth only doing the prefetch of the learner skills API query when FEATURE_ENABLE_MY_CAREER is enabled so users don't need to make an API request for data that won't be used (now that FEATURE_ENABLE_MY_CAREER is disabled for production)?

[adamstankiewicz]

[inform] 'false' still evaluates as truthy within the environment variables. e.g., features.FEATURE_ENABLE_MY_CAREER would still be enabled.

If this should be falsey, use an empty string ''.