ci: `TestCompiler/*.go` times out randomly on windows

[niaow]

TODO: investigate this

Example run: https://github.com/tinygo-org/tinygo/runs/4677830720?check_suite_focus=true#step:14:373

[niaow]

This seems to trigger with arbitrary tests.

[niaow]

This seems to be relevant:

tinygo/main_test.go

Lines 413 to 417 in e536676

	if runtime.GOOS == "windows" {
	// For some reason, tests on Windows can take around
	// 30s to complete. TODO: investigate why and fix this.
	maxDuration = 40 * time.Second
	}

[aykevl]

This seems to be relevant:

tinygo/main_test.go

Lines 413 to 417 in e536676

	if runtime.GOOS == "windows" {
	// For some reason, tests on Windows can take around
	// 30s to complete. TODO: investigate why and fix this.
	maxDuration = 40 * time.Second
	}

I've tried to figure out why that happens but couldn't. If someone wants to dig into it, I would very much appreciate that.