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
```
If there are 2 or more PR(s) in the queue, they will end up with
conflicts (and rechecks). So let us remove the timestamp entirely
when we generate the files.
Fixes#46814
