feat(ast): Add AstKind to TSIndexSignature node

[therewillbecode]

This PR is part of the ongoing work in #11490.

Adds AstKind to TSIndexSignature nodes by removing the entry from the list of exceptions in ast_tools.

[graphite-app]

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #11724 will degrade performances by 13.18%

_{Comparing therewillbecode:add-ast-kind-ts-index-sig (d0989a1) with main (37d4c9a)}

Summary

❌ 1 regressions
✅ 37 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	mangler[cal.com.tsx]	3.1 ms	3.5 ms	-13.18%