Fix value conversion to union types with cyclic members

[Nadeeshan96]

Purpose

Describe the problems, issues, or needs driving this feature/fix and include links to related issues.

$title
Fixes #41930
Duplicate PR #41936.

Approach

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Samples

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Remarks

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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

All modified and coverable lines are covered by tests ✅

Comparison is base (b82855a) 76.67% compared to head (36981c6) 76.67%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #41937   +/-   ##
=========================================
  Coverage     76.67%   76.67%           
- Complexity    53014    53017    +3     
=========================================
  Files          2883     2883           
  Lines        199916   199916           
  Branches      26020    26020           
=========================================
+ Hits         153293   153295    +2     
+ Misses        38161    38160    -1     
+ Partials       8462     8461    -1     

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[HindujaB]

LGTM

[warunalakshitha]

LGTM