Automatic merge from submit-queue (batch tested with PRs 42998, 42902, 42959, 43020, 42948)

Export godep patch files to artifacts

**What this PR does / why we need it**:
If a godep patch file is created, and a `${WORKSPACE}/_artifacts` directory exists, copy the patch file out to it.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

cc: @fejta