feat: Group admin form accepts acronyms starting with numbers for SDO groups

[pselkirk]

Fixes #6825

[codecov]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (d31605e) 88.91% compared to head (ae7ddf6) 88.97%.
Report is 38 commits behind head on main.

❗ Current head ae7ddf6 differs from pull request most recent head 5d4c09c. Consider uploading reports for the commit 5d4c09c to get more accurate results

Files	Patch %	Lines
ietf/sync/views.py	8.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7051      +/-   ##
==========================================
+ Coverage   88.91%   88.97%   +0.05%     
==========================================
  Files         289      291       +2     
  Lines       40454    40717     +263     
==========================================
+ Hits        35971    36226     +255     
- Misses       4483     4491       +8     

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[rjsparks]

Need to tune/test the sdo acronym validation a bit more.

[rjsparks]

Please add the fail tests for group type wg for leading or trailing hyphens