[Worker Change] Add error:NoMessage iff all receives have it in the alternate receive

[lochana-chathura]

Purpose

$subject.

Fixes #41968

Approach

n/a

Samples

function foobar() {
    boolean foo = true;

    worker w1 {
        if foo {
            10 -> w2;
        }
        20 -> w2;
    }

    worker w2 {
        int a = <- w1|w1; // LHS type does not require error:NoMessage now
    }

    _ = wait {a: w1, b: w2};
}

Remarks

n/a

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