Rename HTTP filters desugar class

[ldclakmal]

Purpose

The $subject was done since this is not longer related to HTTP filters and it does only desugaring a particular method for services which is used for declarative auth design of stdlibs.

Related to: ballerina-platform/ballerina-library#584

Check List

• Read the Contributing Guide
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[codecov]

Codecov Report

Merging #31114 (ba35b9f) into master (a411f23) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master   #31114   +/-   ##
=========================================
  Coverage     70.45%   70.46%           
- Complexity    37916    37920    +4     
=========================================
  Files          2840     2840           
  Lines        155921   155921           
  Branches      19505    19505           
=========================================
+ Hits         109861   109872   +11     
+ Misses        39672    39663    -9     
+ Partials       6388     6386    -2     

Impacted Files	Coverage Δ
...alang/compiler/desugar/DeclarativeAuthDesugar.java	22.78% <100.00%> (ø)
...ballerinalang/compiler/desugar/ServiceDesugar.java	92.24% <100.00%> (ø)
...n/java/io/ballerina/projects/bala/BalaProject.java	81.57% <0.00%> (-5.27%)	⬇️
...viders/context/ListenerDeclarationNodeContext.java	74.23% <0.00%> (+0.61%)	⬆️
.../ballerina/runtime/internal/scheduling/Strand.java	82.47% <0.00%> (+2.57%)	⬆️
...runtime/internal/scheduling/WorkerDataChannel.java	89.17% <0.00%> (+4.45%)	⬆️

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