Add information to README for csi-driver-iscsi

[saad-ali]

Add the follow information:

• What version of CSI does this driver support
• What is the status of this driver (alpha).
• Which of the following (optional) features does this driver support:
  • dynamic provisioning
  • online resize or offline resize
  • block
  • snapshot
• Which AccessModes does this driver support?

[saad-ali]

/assign @prateekpandey14

[k8s-ci-robot]

@saad-ali: GitHub didn't allow me to assign the following users: prateekpandey14.

Note that only kubernetes-csi members and repo collaborators can be assigned and that issues/PRs can only have 10 assignees at the same time.
For more information please see the contributor guide

In response to this:

/assign @prateekpandey14

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[fejta-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/lifecycle stale

[msau42]

/lifecycle frozen

[humblec]

@prateekpandey14 I would like to take up this issue if you are not working on this. Please feel free to revert if thats not the case. @saad-ali

[humblec]

/remove-lifecycle stale

[humblec]

/assign @humblec