Filter blank backend role before creating internal user

[cwperks]

Description

Filter blank backend role before creating internal user

Category

[Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation]

Bug fix

Check List

• New functionality includes testing
• New functionality has been documented
• Commits are signed per the DCO using --signoff

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

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 71.57%. Comparing base (c38161d) to head (07e3642).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...n/panels/internal-user-edit/internal-user-edit.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2330      +/-   ##
==========================================
- Coverage   71.59%   71.57%   -0.03%     
==========================================
  Files         101      101              
  Lines        2975     2976       +1     
  Branches      505      505              
==========================================
  Hits         2130     2130              
- Misses        692      693       +1     
  Partials      153      153              

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