Re-enable k8s e2e tests in pull jobs

[msau42]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
snapshotter pull jobs were misleading and not actually running the k8s e2e tests.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[msau42]

@xing-yang @ggriffiths I think there are some problems with the way rbac rules are installed. Can you take a look?

[ggriffiths]

@xing-yang @ggriffiths I think there are some problems with the way rbac rules are installed. Can you take a look?

Yes, taking a look now.

[ggriffiths]

@msau42 @xing-yang I have two PRs open to fix these tests:

1. Fix for RBAC version: Fix csi-snapshotter RBAC yaml version csi-release-tools#78
2. With the above fix, k8s 1.16 was still failing to deploy the hostpath driver. This fixes that problem:
   Fix deploy-hostpath.sh hostpath pod and CRD conditional for k8s 1.16 csi-driver-host-path#174

Both fixes are tested together in this PR (with your change from this PR)
#299

[msau42]

/retest

[xing-yang]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: msau42, xing-yang

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