`@rpglint-skip` not working for multi-location errors (e.g. `StringLiteralDupe`, `NoUnreferenced`)

[kluhan]

Description

When using the @rpglint-skip or @rpglint-skip-rules annotation, some error types are not skipped as expected.

This seems to affect rules that report multiple locations for a single logical issue, such as:

• StringLiteralDupe
• NoUnreferenced
• IncorrectVariableCase

Even when the annotation is placed correctly, errors are still reported for lines that should be skipped.

Example

**free
dcl-s myVar char(10);

// @rpglint-skip
myvar = 'first';

myvar = 'second';

return;

Expected Behavior

Only one IncorrectVariableCase error should be reported (for the second assignment).

The first assignment (myvar = 'first';) should be skipped due to the @rpglint-skip annotation.

Actual Behavior

Two IncorrectVariableCase errors are reported:

• One for myvar = 'first'; (should be skipped)
• One for myvar = 'second';

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Additional Context

This behavior appears to occur with rules that perform some lookup logic. If all errors for a Literal are skiped it gain works like intended.

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I'm already working on a solution. The PR should be ready by tomorrow.