build: Use Go 1.22, minimum is Go 1.21 (#9408)

Also updated dependencies, and an adjustment to build tags for how those
are handled and how irrelevant go1.15 is nowadays...

lib/connections/quic_listen.go

@@ -4,8 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at http://mozilla.org/MPL/2.0/.
 
-//go:build go1.15 && !noquic
-// +build go1.15,!noquic
+//go:build !noquic
+// +build !noquic
 
 package connections
 

lib/connections/quic_misc.go

@@ -4,8 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at http://mozilla.org/MPL/2.0/.
 
-//go:build go1.15 && !noquic
-// +build go1.15,!noquic
+//go:build !noquic
+// +build !noquic
 
 package connections
 

lib/connections/quic_unsupported.go

@@ -4,8 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at http://mozilla.org/MPL/2.0/.
 
-//go:build noquic || !go1.15
-// +build noquic !go1.15
+//go:build noquic
+// +build noquic
 
 package connections