[WIP] Change runtime channel for worker message passing

[HindujaB]

Purpose

$subject

Fixes #

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 (a0469f6) 0.00% compared to head (9e9ad99) 76.73%.

Additional details and impacted files

@@                 Coverage Diff                  @@
##             worker_change   #41736       +/-   ##
====================================================
+ Coverage             0.00%   76.73%   +76.73%     
- Complexity               0    52718    +52718     
====================================================
  Files                    9     2881     +2872     
  Lines                   35   198785   +198750     
  Branches                 0    25815    +25815     
====================================================
+ Hits                     0   152536   +152536     
- Misses                  35    37819    +37784     
- Partials                 0     8430     +8430     

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[HindujaB]

Closing as the required changes are added with PR #41754