Change the name of the e2e test program currently called mock

[lpabon]

There are two things called mock. One is the Golang mock driver automatically generated and used by clients of CSI for unit testing. The other is the program used by csi-sanity for unit tests. This other program can have the name changed so that the confusion is removed.

[fejta-bot]

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/lifecycle stale

[fejta-bot]

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/lifecycle rotten

[msau42]

/close

[k8s-ci-robot]

@msau42: Closing this issue.

In response to this:

/close

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