Release v4.0.1

[yonatankahana]

all work related to release version 4.0.1

Changes:

• Add arm7 (32bit) support (Add arm7 to multiarch build #58)
• Preserve name of the PV directory name during archiving (Preserve name of the PV directory name during archiving #59)

[yonatankahana]

/assign @kmova

[kmova]

/approve
/lgtm

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[geoff-coppertop]

It doesn't look like the 32-bit arm image was built when I check 4.01 gcr.io/k8s-staging-sig-storage/nfs-subdir-external-provisioner

[yonatankahana]

It doesn't look like the 32-bit arm image was built when I check 4.01 gcr.io/k8s-staging-sig-storage/nfs-subdir-external-provisioner

cc @kmova
plus, we merged #68 therefore the chart version should be bumped here before we merged. ill open new PR to fix the chart version but first we need to fix the image with arm32.