tests: Add quicv2 test case / pcap

Produced using the go-quic  echo example and forcing QUIC v2.

testing/Baseline/tests.quicv2-echo-443/conn.log.cut

@@ -0,0 +1,3 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+ts	uid	history	service
+XXXXXXXXXX.XXXXXX	CHhAvVGS1DHFjwGM9	Dd	quic,ssl

testing/Baseline/tests.quicv2-echo-443/quic.log

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+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+#separator \x09
+#set_separator	,
+#empty_field	(empty)
+#unset_field	-
+#path	quic
+#open XXXX-XX-XX-XX-XX-XX
+#fields	ts	uid	id.orig_h	id.orig_p	id.resp_h	id.resp_p	version	client_initial_dcid	server_scid	server_name	client_protocol	history
+#types	time	string	addr	port	addr	port	string	string	string	string	string	string
+XXXXXXXXXX.XXXXXX	CHhAvVGS1DHFjwGM9	127.0.0.1	49320	127.0.0.1	443	quicv2	fa603212c8688817af3d3238735bc7	b168b5cc	localhost	quic-echo-example	ISIIisIH
+#close XXXX-XX-XX-XX-XX-XX

testing/Baseline/tests.quicv2-echo-443/ssl.log

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+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+#separator \x09
+#set_separator	,
+#empty_field	(empty)
+#unset_field	-
+#path	ssl
+#open XXXX-XX-XX-XX-XX-XX
+#fields	ts	uid	id.orig_h	id.orig_p	id.resp_h	id.resp_p	version	cipher	curve	server_name	resumed	last_alert	next_protocol	established	ssl_history	cert_chain_fps	client_cert_chain_fps	sni_matches_cert
+#types	time	string	addr	port	addr	port	string	string	string	string	bool	string	string	bool	string	vector[string]	vector[string]	bool
+XXXXXXXXXX.XXXXXX	CHhAvVGS1DHFjwGM9	127.0.0.1	49320	127.0.0.1	443	TLSv13	TLS_AES_128_GCM_SHA256	x25519	localhost	F	-	-	F	Cs	-	-	-
+#close XXXX-XX-XX-XX-XX-XX

testing/tests/quicv2-echo-443.zeek

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+# @TEST-DOC: Pcap with quicv2 echo traffic as produced by https://raw.githubusercontent.com/quic-go/quic-go/master/example/echo/echo.go
+# @TEST-EXEC: zeek -Cr $TRACES/quicv2-echo-443.pcap $PACKAGE
+# @TEST-EXEC: zeek-cut -m ts uid history service < conn.log > conn.log.cut
+# @TEST-EXEC: btest-diff conn.log.cut
+# @TEST-EXEC: btest-diff ssl.log
+# @TEST-EXEC: btest-diff quic.log