unskip try-catch-throw test — now passes on both compilers

[cs01]

Summary

• throw "string" + try-catch now works correctly on both JS and native compilers
• Renamed try-catch-throw.ts → try-catch-throw-string.ts to avoid output binary collision with existing try-catch-throw.js at concurrency 32
• Removes @test-skip — this was skipped since the feature was added

Test plan

• npm run verify:quick passes (tests + self-hosting)
• Both JS and native compilers produce correct TEST_PASSED output

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