Closes #62305
Signed-off-by: Harsh Desai <harsh@portworx.com>

update comment and variable references to GiB
Signed-off-by: Harsh Desai <harsh@portworx.com>

explicitly check volume size after resize and fix size volume spec
Signed-off-by: Harsh Desai <harsh@portworx.com>

If Portworx volume is already greater than new size, skip resize
Signed-off-by: Harsh Desai <harsh@portworx.com>

Allow updated volume to be greater than requested size
Signed-off-by: Harsh Desai <harsh@portworx.com>