Single Executable Application tests often fail on RISC-V

[sxa]

The SEA tests are failing in many cases. The symptoms are different depending on the hardware. Using a build of Node v25.2.2 I'm currently getting:

• SIGILL on a TH1520 system with Xuantie C910 cores (RVV0.7 specification) (Built with gcc 14.2.0-ubuntu) (Potentiaily a highway issue)
• SIGSEGV on a SpacemiT-K1 (RVV1.0 but with a 6.1 kernel. Built with gcc 14.2.0-debian)

I have had a build pass SEA tests under qemu on an x64 host, but nowhere near consistently enough to justify not excluding it.

Noting that the The SIGILL/SIGSEGV also occurs in v22.x which doesn't use highway.

I'll add to those results as I get more details.

[sxa]

Noting that the SIGILL goes away on the TH1520 boards with the highway patch referenced in nodejs/build#4099 (comment) however it still gives a SIGSEGV.

[joyeecheung]

Maybe #61167 could make the SIGSEGV go away on RISC-V, though I don't have a board to test it..