missing "check_mode: no"s for several read-only tasks (#8584)

this is not complete -- there are almost certainly more instances of
this issue

roles/kubernetes/node/tasks/main.yml

@@ -52,6 +52,7 @@
   register: modinfo_br_netfilter
   failed_when: modinfo_br_netfilter.rc not in [0, 1]
   changed_when: false
+  check_mode: no
 
 - name: Verify br_netfilter module path exists
   file:
@@ -77,6 +78,7 @@
   command: "sysctl net.bridge.bridge-nf-call-iptables"
   failed_when: false
   changed_when: false
+  check_mode: no
   register: sysctl_bridge_nf_call_iptables
 
 - name: Enable bridge-nf-call tables