Failed to create snapshot in CI

[Madhu-1]

Currently we are using https://github.com/ceph/ceph-csi/blob/master/scripts/install-snapshot.sh to install the snapshot controller and the snapshot version is mentioned in the build.env https://github.com/ceph/ceph-csi/blob/master/build.env#L28.

Recently external-snapshotter master is updated to use v1.snapshot CRD instead of beta.

the deployment templates from the v3.0.1 snapshot are using the canary snapshot controller image. because of that our E2E is failing. we need to use the sed command to replace canary with the snapshot version mentioned in build.env