Fix incorrect MachineInformer callback

[elankath]

How to categorize this issue?

/area control-plane
/kind bug
/priority 3

What happened:

A Machine informer callback incorrectly calls the wrong callback function as seen here:

machine-controller-manager/pkg/controller/controller.go

Line 122 in 26533e0

DeleteFunc: controller.deleteMachineDeployment,

. Though this thankfully doesn't result in errors due to the cast check, it is semantically incorrect and must be fixed.

What you expected to happen:

The Machine informer delete callback should correctly call deleteMachineToMachineDeployment

How to reproduce it (as minimally and precisely as possible):
Setup local MCM, Add a log statement to callback, delete a Machine object and observe bad callback being invoked.

Anything else we need to know?:
NA

Environment:

NA