fix(errors): align errorKindToString with SARIF level values

[royalpinto007]

This PR introduces modifications to the errorKindToString function, aligning it with the SARIF specification for the level property in result objects (SARIF §3.27.10). The function now returns SARIF-compatible severity levels based on the ErrorKind values, facilitating accurate reporting in SARIF format.

Validated the output- SARIF Validator

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