internal/trace/v2: failures on Windows

[mknyszek]

#!watchflakes
default <- pkg == "internal/trace/v2" && test ~ `TestTrace`

There are two kinds of failures on Windows I've seen so far. One is "per-M streams out of order" and the other is "expected a proc but didn't have one". I understand what's happening in both, just have to fix them.

[gopherbot]

Change https://go.dev/cl/541197 mentions this issue: internal/trace/v2: disable TestTrace* tests on Windows for now

[mknyszek]

Removing Soon since I landed a temporary mitigation.

[gopherbot]

Change https://go.dev/cl/541695 mentions this issue: internal/trace/v2: don't enforce batch order on Ms

[gopherbot]

Change https://go.dev/cl/541696 mentions this issue: internal/trace/v2: resolve syscall parsing ambiguity