Refactor logging to give more visibility to check and heal services

[ese]

Description

In order to diagnose issues with the operator is more relevant to know what is happening with check and heal. We were logging mostly about kubernetes service performing updates in kubernetes objects which usually is not relevant once the cluster is bootstrapped.

• Change some messages to give more clear information
• Demote kubernetes objects updates to debug devel
• Promote relevant messages in checker to Info and Warning levels
• Add namespace and redisfailover context to checker messages
• Before applying check and heal wait for all expected pods up and running instead wait only for exists to let Kubernetes controllers do their job

[samof76]

@ese there seems to be inherent issue with this

Before applying check and heal wait for all expected pods up and running instead wait only for exists to let Kubernetes controllers do their job

Consider this scenario....

1. The master and sentinel pods are running
2. The master pod and setinels get killed.

3. Those pods are unable to get scheduled.

   In this case the check-and-heal would not do what its intended to do.

Consider another scenario...

1. The master and sentinel pods are running
2. All of the sentinel get killed and along with a slave
3. Now the sentinels get scheduled but on slave is still node scheduled.

In this case the check-and-heal would not configure the sentinels because of the fix here.