Fix quicer test suites failing when COWBOY_QUICER not set

Add fallback all/0 and groups/0 functions in -else block so CT
doesn't fail with 'all/0 is missing' when the suites are run
without COWBOY_QUICER defined.

Author: benoitc

test/draft_h3_webtransport_SUITE.erl

@@ -811,4 +811,10 @@ do_receive_datagram(Conn) ->
 		error({timeout, waiting_for_datagram})
 	end.
 
+-else.
+
+all() -> [].
+
+groups() -> [].
+
 -endif.

test/rfc9114_SUITE.erl

@@ -2423,4 +2423,10 @@ do_wait_connection_closed(Conn) ->
 		{error, timeout}
 	end.
 
+-else.
+
+all() -> [].
+
+groups() -> [].
+
 -endif.

test/rfc9204_SUITE.erl

@@ -354,4 +354,10 @@ do_wait_unidi_streams(Conn, Acc) ->
 %% a connection error of the appropriate type if on the
 %% encoder or decoder stream.
 
+-else.
+
+all() -> [].
+
+groups() -> [].
+
 -endif.

test/rfc9220_SUITE.erl

@@ -486,4 +486,10 @@ accept_handshake_when_enabled(Config) ->
 %% @todo server other frame with FIN
 %% @todo client close connection
 
+-else.
+
+all() -> [].
+
+groups() -> [].
+
 -endif.