Only use stat get_checksum: yes when needed (#7270)

By default Ansible stat module compute checksum, list extended attributes and find mime type
To find all stat invocations that really use one of those:
git grep -F stat. | grep -vE 'stat.(islnk|exists|lnk_source|writeable)'

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

roles/kubernetes/preinstall/tasks/0040-set_facts.yml

@@ -9,6 +9,9 @@
 - name: check if booted with ostree
   stat:
     path: /run/ostree-booted
+    get_attributes: no
+    get_checksum: no
+    get_mime: no
   register: ostree
 
 - name: set is_fedora_coreos
@@ -59,6 +62,9 @@
 - name: check if kubelet is configured
   stat:
     path: "{{ kube_config_dir }}/kubelet.env"
+    get_attributes: no
+    get_checksum: no
+    get_mime: no
   register: kubelet_configured
   changed_when: false
 
@@ -84,6 +90,9 @@
 - name: check if /etc/dhclient.conf exists
   stat:
     path: /etc/dhclient.conf
+    get_attributes: no
+    get_checksum: no
+    get_mime: no
   register: dhclient_stat
 
 - name: target dhclient conf file for /etc/dhclient.conf
@@ -94,6 +103,9 @@
 - name: check if /etc/dhcp/dhclient.conf exists
   stat:
     path: /etc/dhcp/dhclient.conf
+    get_attributes: no
+    get_checksum: no
+    get_mime: no
   register: dhcp_dhclient_stat
 
 - name: target dhclient conf file for /etc/dhcp/dhclient.conf
@@ -170,6 +182,9 @@
 - name: check /usr readonly
   stat:
     path: "/usr"
+    get_attributes: no
+    get_checksum: no
+    get_mime: no
   register: usr
 
 - name: set alternate flexvolume path