feat: mark static strings for flash messages on login

[jajjibhai008]

Description

JIRA -> ENT-8748

For all changes

• Ensure adequate tests are in place (or reviewed existing tests cover changes)

Only if submitting a visual change

• Ensure to attach screenshots
• Ensure to have UX team confirm screenshots

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.32%. Comparing base (85e2cdf) to head (edd4e31).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1246   +/-   ##
=======================================
  Coverage   85.32%   85.32%           
=======================================
  Files         538      538           
  Lines       11848    11853    +5     
  Branches     2493     2531   +38     
=======================================
+ Hits        10109    10114    +5     
+ Misses       1681     1680    -1     
- Partials       58       59    +1     

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[mahamakifdar19]

LGTM