Automated cherry pick of #216: retry deadline respected

[himanshu-kun]

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #213

Special notes for your reviewer:

Release note:

Bug where deadline for machineDeployment fetch/update was not respected is resolved. Due to this bug , bulk removal of empty nodes was getting blocked, which in turn, blocked scale-ups for pending pods

Removes taints from all nodes to allow for reevaluation during restarts.

Gardener autoscaler version is shown in logs of CA , earlier only upstream autoscaler version was shown

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ himanshu-kun
❌ fookenc
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[rishabh-11]

/lgtm