Provisioner's SupportsBlock() function asserts true when it shouldn’t

[niladrih]

Describe the bug: The SupportsBlock() function should return a 'false' as the support for block volumes was dropped with the removal of the 'device' mode provisioner.

dynamic-localpv-provisioner/cmd/provisioner-localpv/app/provisioner.go

Lines 75 to 77 in ed84837

	func (p *Provisioner) SupportsBlock(_ context.Context) bool {
	return true
	}

This provisioner runs mkdir and other similar commands against filesystems. It definitely does not support block volumes.

Environment details:

• OpenEBS version (use kubectl get po -n openebs --show-labels): 4.3.3
• Kubernetes version (use kubectl version):
• Cloud provider or hardware configuration:
• OS (e.g: cat /etc/os-release): Ubuntu 22.04.4 LTS
• kernel (e.g: uname -a): 5.15.0-140-generic
• others: