Insert logic to validate empty string where the default is not null

[blutarch]

Please make sure these points are completed:

Along with vanilla/internal#2197, this will close issue vanilla/support#1239

The updated comboBreaker data was not being saved to the db.
Because the badge status was an empty string and didn't have a default value of null, it was not passing validation. This fix adds logic to validateRequired() in functions.validation that allows it to pass validation.

To Test:

• Open the GDN_UserBadge table
• Give a user a badge
• Verify that the Attributes field for the comboBreaker badge (BadgeID = 3) updates with a new event
• Give that user 4 more badges
• Verify that the status field for the comboBreaker badge switches from NULL to given

[codecov]

Codecov Report

Merging #9981 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #9981      +/-   ##
============================================
- Coverage     52.29%   52.27%   -0.03%     
- Complexity     3766     7806    +4040     
============================================
  Files           362      362              
  Lines         43849    43818      -31     
============================================
- Hits          22931    22905      -26     
+ Misses        20918    20913       -5

Impacted Files	Coverage Δ	Complexity Δ
library/core/functions.validation.php	69.68% <100%> (+0.49%)	0 <0> (ø)	⬇️
...oard/controllers/api/AuthenticateApiController.php	83.27% <0%> (-0.27%)	62% <0%> (ø)
library/Vanilla/Models/InstallModel.php	58.53% <0%> (-0.26%)	51% <0%> (+51%)
...ry/Vanilla/EmbeddedContent/LegacyEmbedReplacer.php	70.73% <0%> (-0.24%)	0% <0%> (ø)
library/Vanilla/Authenticator/SSOAuthenticator.php	82.73% <0%> (-0.13%)	48% <0%> (+48%)
library/Vanilla/Models/FsThemeProvider.php	80.81% <0%> (-0.12%)	0% <0%> (ø)
...rd/controllers/api/AuthenticatorsApiController.php	89.47% <0%> (-0.1%)	28% <0%> (ø)
...s/dashboard/controllers/api/MediaApiController.php	85.02% <0%> (-0.08%)	39% <0%> (ø)
...ns/vanilla/controllers/api/DraftsApiController.php	89.75% <0%> (-0.07%)	43% <0%> (ø)
...ons/controllers/api/ConversationsApiController.php	92.4% <0%> (-0.07%)	57% <0%> (ø)
... and 13 more

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[tburry]

This is 99% done. Two small issues.

[danni-stark]

Tested
UserBadge.Attributes updating with the events