Automatic merge from submit-queue

bump QEMU version to v2.9.1

**What this PR does / why we need it**:

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
xref #38067

**Special notes for your reviewer**:
/assign @luxas 

**Release note**:

```release-note
update QEMU version to v2.9.1
```