fix(es/react-compiler): Mark function components declared as a var interesting

[kdy1]

Description:

Related issue:

• NextJS 15.3.1 broke the React Compiler vercel/next.js#78867

[changeset-bot]

⚠️ No Changeset found

Latest commit: 95a27ad

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[codspeed-hq]

CodSpeed Performance Report

Merging #10437 will degrade performances by 4.2%

_{Comparing kdy1/rc (95a27ad) with main (164cbaa)}

Summary

⚡ 1 improvements
❌ 1 regressions
✅ 150 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	deserialization of serde	2.4 µs	2.4 µs	+2.46%
❌	serialization of serde	2.7 µs	2.8 µs	-4.2%