:seedling: Reduce reconcilements

[janiskemper]

What this PR does / why we need it:

• Filter HCloudMachine events so that status updates of the resource don't trigger another reconcilement of HCloudMachine
• Filter HetznerCluster events so that status updates of the resource don't trigger another reconcilement of HetznerCluster
• Filter HetznerCluster events so that some status updates that are not important don't trigger reconcilement of HCloudMachine
• Filter Machine events so that status updates of the resource don't trigger another reconcilement of HCloudMachine a
• Filter Cluster events so that status updates of the resource don't trigger another reconcilement of HetznerCluster
• Increase the time period to requeue if a server is starting
• Increase the time period to requeue if a server has not status yet
• Increase the time period to requeue if the kubeapi server is not yet reachable before adding it as target to the load balancer
• Don't trigger multiple shutdown calls for one server and increase the timeout to requeue after a shutdown is triggered

TODOs:

• [x] squash commits
• [ ] include documentation
• [ ] add unit tests

Side note: I will add an issue for unit testing the functions I have added after this is getting merged.