fix: bugsnag error logs in git when staging fails is an expected error

[abose]

expected errors in staging on click on the stage file/all checkbox in git panel should not be logged as error in bugsnag. Now its shown to user as error notification as the user needs to know the operation failed.

 This usually happens hwen a git index is locked Eg. error.
 Error: Error: fatal: Unable to create 'E:/.../test-git/.git/index.lock': File exists.

 Another git process seems to be running in this repository, e.g.
an editor opened by 'git commit'. Please make sure all processes
are terminated then try again. If it still fails, a git process
may have crashed in this repository earlier:
remove the file manually to continue.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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