e2e: allow parameterizing kind config

This commit allows the kind cluster configuration to be parameterized at
call time. This enables the test suite to build multiple clusters with
different configurations, e.g. different CIDRs, different numbers of
nodes, etc.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>

e2e/setup.sh

@@ -3,5 +3,5 @@
 . lib.sh
 
 setup_suite() {
-	create_cluster
+	create_cluster "$(build_kind_config 2)"
 }