Port TS PR 60490

[jakebailey]

Ports https://github.com/microsoft/TypeScript/pull/60490/files

[Copilot]

Pull Request Overview

This PR ports changes from the upstream TypeScript PR 60490, updating baseline error outputs for classes extending or implementing primitive types and refining the internal error-checking logic.

• Updated expected error outputs in both conformance and compiler baseline files for classes extending or implementing primitives.
• Refactored error-checking logic in the internal checker to use ast.IsClassLike instead of a strict Kind comparison.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
testdata/baselines/reference/submodule/conformance/classExtendingPrimitive.errors.txt.diff	Removed outdated diff content as part of the updated expected error outputs.
testdata/baselines/reference/submodule/conformance/classExtendingPrimitive.errors.txt	Updated expected error outputs for classes extending primitive types (error count increased).
testdata/baselines/reference/submodule/compiler/classImplementsPrimitive.errors.txt.diff	Removed outdated diff content as part of the revised expected error outputs.
testdata/baselines/reference/submodule/compiler/classImplementsPrimitive.errors.txt	Updated expected error outputs for classes implementing primitive types (error count increased).
internal/checker/checker.go	Refactored error-checking conditions to use ast.IsClassLike, aligning with the new handling of class-like constructs.