Allow application creation in sub organization level

[ShanChathusanda93]

Purpose

• $subject
• Improvement for : Support for creating OAuth 2.0 clients inside B2B organizations for B2B API access wso2/product-is#21208
• Allowing the application creation in the sub organization level through the DCR endpoint when accessing from the tenant perspective.

[AnuradhaSK]

add unit tests

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 4 lines in your changes missing coverage. Please review.

Project coverage is 49.44%. Comparing base (3833c81) to head (d913897).
Report is 109 commits behind head on main.

Files with missing lines	Patch %	Lines
...ation/listener/FragmentApplicationMgtListener.java	71.42%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #409      +/-   ##
============================================
+ Coverage     47.41%   49.44%   +2.03%     
- Complexity     1037     1168     +131     
============================================
  Files           113      120       +7     
  Lines          6766     7254     +488     
  Branches        810      869      +59     
============================================
+ Hits           3208     3587     +379     
- Misses         3269     3362      +93     
- Partials        289      305      +16     

Flag	Coverage Δ
unit	35.52% <71.42%> (+6.41%)	⬆️

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