Automatic merge from submit-queue (batch tested with PRs 45877, 46846, 46630, 46087, 47003)

func parseEndpointWithFallbackProtocol should check if protocol of endpoint is empty

**What this PR does / why we need it**:
func parseEndpointWithFallbackProtocol should check if protocol of endpoint is empty
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: part of #45927
NONE
**Special notes for your reviewer**:
NONE
**Release note**:

```release-note
NONE
```