Blueprint Admin: Fix form validation

[Pezmc]

• Allow submitting form with errors
• Clear errors on form submit

Description

Related Issue(s)

Fixes #3266

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Backport needed? -> add the backport label
• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (9fa974f) 40.74% compared to head (40d02b0) 40.74%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
...FlowBlueprints/dialogs/FlowBlueprintFormDialog.vue	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3270      +/-   ##
==========================================
- Coverage   40.74%   40.74%   -0.01%     
==========================================
  Files         603      603              
  Lines       22527    22529       +2     
  Branches     5445     5445              
==========================================
  Hits         9179     9179              
- Misses      13348    13350       +2     

Flag	Coverage Δ
backend	77.54% <ø> (ø)
frontend	2.01% <0.00%> (-0.01%)	⬇️

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