[Spring Cleanup] Remove spring dependency in OAuth2 scopes endpoint

[lashinijay]

Purpose

This PR removes dependencies and usages of the Spring framework in the DCR REST API.

Related Issue(s)

• Remove Spring dependencies from Identity Server applications wso2/product-is#21159

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 55.76%. Comparing base (1eb13c1) to head (15fa103).

Files with missing lines	Patch %	Lines
...pe/endpoint/factories/ScopesApiServiceFactory.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2629   +/-   ##
=========================================
  Coverage     55.76%   55.76%           
+ Complexity     8239     8187   -52     
=========================================
  Files           632      632           
  Lines         47478    47478           
  Branches       8385     8385           
=========================================
  Hits          26477    26477           
  Misses        17211    17211           
  Partials       3790     3790           

Flag	Coverage Δ
unit	38.65% <0.00%> (ø)

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[lashinijay]

Duplicate of #2632