TUN-5262: Allow to configure max fetch size for listing queries

This can be useful/important for accounts with many tunnels that exceed
the 1000 default page size.

There are various tunnel subcommands that use listing underneath, so we make
that flag a tunnel one, rather than adding it to each subcommand.

tunnelstore/filter.go

@@ -2,6 +2,7 @@ package tunnelstore
 
 import (
 	"net/url"
+	"strconv"
 	"time"
 
 	"github.com/google/uuid"
@@ -45,6 +46,10 @@ func (f *Filter) ByTunnelID(tunnelID uuid.UUID) {
 	f.queryParams.Set("uuid", tunnelID.String())
 }
 
+func (f *Filter) MaxFetchSize(max uint) {
+	f.queryParams.Set("per_page", strconv.Itoa(int(max)))
+}
+
 func (f Filter) encode() string {
 	return f.queryParams.Encode()
 }