Pull request: all: mv IsOpenWrt

Updates #2829.

Squashed commit of the following:

commit a284a26ba5df101c78e6f866d1bdfa540d205666
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu Apr 8 20:34:20 2021 +0300

    aghos: fix darwin

commit 9dbd42d75ebb048c83dbd06a1f09d950b3d12181
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu Apr 8 20:11:56 2021 +0300

    all: mv IsOpenWrt

scripts/hooks/pre-commit

@@ -14,7 +14,7 @@ fi
 
 if [ "$(git diff --cached --name-only -- '*.go' 'go.mod')" ]
 then
-	make go-lint go-test
+	make go-os-check go-lint go-test
 fi
 
 if [ "$(git diff --cached --name-only -- './openapi/openapi.yaml')" ]