werf dismiss v2

[ilya-lesikov]

Before proceeding

• I didn't find a similar issue

Problem

In werf v2 werf dismiss still works using the old deployment engine.

Solution (if you have one)

We should migrate it to Nelm.

Additional information

Refs: #99, #109, #60

[ilya-lesikov]

We have Nelm action for dismiss now. But under the hood is still legacy Helm code.