[master] Fix legacy mocking failure

[Thevakumar-Luheerathan]

Purpose

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

Fixes #40731

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

[github-actions]

This PR has been open for more than 15 days with no activity. This will be closed in 3 days unless the stale label is removed or commented.

[github-actions]

Closed PR due to inactivity for more than 18 days.

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (ae5102c) 76.68% compared to head (7faa8ea) 76.73%.
Report is 230 commits behind head on master.

Files	Patch %	Lines
...o2/ballerinalang/compiler/desugar/MockDesugar.java	20.00%	4 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #41686      +/-   ##
============================================
+ Coverage     76.68%   76.73%   +0.05%     
- Complexity    52671    52727      +56     
============================================
  Files          2881     2878       -3     
  Lines        198686   198747      +61     
  Branches      25822    25838      +16     
============================================
+ Hits         152357   152506     +149     
+ Misses        37892    37808      -84     
+ Partials       8437     8433       -4     

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