Pull request 399: AGDNS-2823 Rename test files

Merge in GO/dnsproxy from AGDNS-2823-rename-tests to master

Squashed commit of the following:

commit d3ab025
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Apr 10 20:56:44 2025 +0300

    all: rename other

commit fd1ec64
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Apr 10 20:53:09 2025 +0300

    scripts: rm underscores exceptions

commit 7c49069
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Apr 10 20:40:57 2025 +0300

    all: rename test files

Author: EugeneOne1

fastip/cache_test.go renamed to fastip/cache_internal_test.go

@@ -124,11 +124,6 @@ underscores() {
 			-o -name '*_test.go' \
 			-o -name '*_unix.go' \
 			-o -name '*_windows.go' \
-			-o -name '*_dnscrypt.go' \
-			-o -name '*_https.go' \
-			-o -name '*_quic.go' \
-			-o -name '*_tcp.go' \
-			-o -name '*_udp.go' \
 			')' \
 			-exec 'printf' '\t%s\n' '{}' ';'
 	)"