UI support for extraconfig in deploy and update instance

[abh1sar]

Description

This PR fixes #7849

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 17.42%. Comparing base (23c9e83) to head (64b396e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../src/main/java/com/cloud/vm/UserVmManagerImpl.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #11717      +/-   ##
============================================
- Coverage     17.42%   17.42%   -0.01%     
+ Complexity    15338    15335       -3     
============================================
  Files          5892     5892              
  Lines        526521   526531      +10     
  Branches      64293    64298       +5     
============================================
- Hits          91770    91761       -9     
- Misses       424398   424418      +20     
+ Partials      10353    10352       -1     

Flag	Coverage Δ
uitests	3.61% <ø> (-0.01%)	⬇️
unittests	18.47% <0.00%> (-0.01%)	⬇️

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