Merge pull request #46829 from cblecker/swagger-dir-fix

Automatic merge from submit-queue (batch tested with PRs 47921, 45984, 46829, 46896, 46923)

Create output_dir if doesn't exist

**What this PR does / why we need it**:
Minor fix to the swagger spec gen, that if the directory doesn't exist, create it before copying.

**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
```

hack/lib/swagger.sh

@@ -154,6 +154,9 @@ kube::swagger::gen_api_ref_docs() {
 
   echo "Moving api reference docs from ${output_tmp} to ${output_dir}"
 
+  # Create output_dir if doesn't exist. Prevents error on copy.
+  mkdir -p "${output_dir}"
+
   cp -af "${output_tmp}"/* "${output_dir}"
   rm -r "${output_tmp}"
 }