Update tests; run fuzzing (#294)

Run fuzzing tests in CI.

Use race detector when running tests.

Add missing `t.Helper()` calls.

Update test helpers in `pkg/bindfilter` to use `RtlGetNtVersionNumbers`
instead of reading registry, and skip tests if not running as admin.

Signed-off-by: Hamza El-Saawy <hamzaelsaawy@microsoft.com>

pkg/etw/provider_test.go

@@ -10,6 +10,8 @@ import (
 )
 
 func mustGUIDFromString(t *testing.T, s string) guid.GUID {
+	t.Helper()
+
 	g, err := guid.FromString(s)
 	if err != nil {
 		t.Fatal(err)