feat: REST endpoint to update allowed anchor origins

[bstasyszyn]

closes #1378

Signed-off-by: Bob Stasyszyn Bob.Stasyszyn@securekey.com

[codecov]

Codecov Report

Merging #1381 (5f0730b) into main (8ce5dd4) will increase coverage by 0.04%.
The diff coverage is 96.66%.

@@            Coverage Diff             @@
##             main    #1381      +/-   ##
==========================================
+ Coverage   87.90%   87.94%   +0.04%     
==========================================
  Files         201      202       +1     
  Lines       18846    18936      +90     
==========================================
+ Hits        16566    16653      +87     
- Misses       1463     1465       +2     
- Partials      817      818       +1     

Impacted Files	Coverage Δ
...rigins/allowedoriginsrest/allowedoriginshandler.go	96.59% <96.59%> (ø)
cmd/orb-server/startcmd/start.go	67.57% <100.00%> (+0.07%)	⬆️

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