Fix leaking anyimpl ref

[heshanpadmasiri]

Purpose

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

Fixes #44428

Approach

Describe how you are implementing the solutions along with the design details.

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.
✅ Project coverage is 75.03%. Comparing base (8a4fb2d) to head (b2a26af).
⚠️ Report is 65 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #44427   +/-   ##
=========================================
  Coverage     75.03%   75.03%           
  Complexity    58626    58626           
=========================================
  Files          3600     3600           
  Lines        226768   226769    +1     
  Branches      29518    29518           
=========================================
+ Hits         170152   170153    +1     
- Misses        47136    47138    +2     
+ Partials       9480     9478    -2     

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[warunalakshitha]

LGTM