change default WASI stack size

[andrewrk]

to match the other operating systems. 16 MiB

closes #18885

[andrewrk]

Hmm strange, the tests passed for me locally.

[kubkon]

Hmm strange, the tests passed for me locally.

Different wasmtime versions maybe?

[andrewrk]

Different wasmtime versions maybe?

nope, both wasmtime v10.0.2

however, I was able to reproduce it by using zig build test-std -fwasmtime

[andrewrk]

found the problem:

zig/test/tests.zig

Lines 1141 to 1144 in 723d13f

	if (target.os.tag == .wasi) {
	// WASI's default stack size can be too small for some big tests.
	these_tests.stack_size = 2 * 1024 * 1024;
	}