Skip updating group last modified date for secondary userstores

[HasiniSama]

$subject

[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 47.38%. Comparing base (67df964) to head (8266ad0).
Report is 11 commits behind head on master.

Files with missing lines	Patch %	Lines
...on/identity/scim2/common/impl/SCIMUserManager.java	16.66%	1 Missing and 4 partials ⚠️

❌ Your patch status has failed because the patch coverage (16.66%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #603      +/-   ##
============================================
+ Coverage     47.33%   47.38%   +0.05%     
+ Complexity     1130     1084      -46     
============================================
  Files            41       41              
  Lines          9141     9146       +5     
  Branches       2432     2436       +4     
============================================
+ Hits           4327     4334       +7     
+ Misses         3886     3881       -5     
- Partials        928      931       +3     

Flag	Coverage Δ
unit	32.98% <16.66%> (+0.06%)	⬆️

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[HasiniSama]

This PR will be closed due to: https://github.com/wso2-enterprise/asgardeo-product/issues/28651#issuecomment-2635759703

This approach doesn't resolve the issue.