Update QEMU used in CI (#9713)

* Update QEMU used in CI

I'm getting segfaults on s390x in #9702 and I can't reproduce them
locally in QEMU. Try updating QEMU to see if it's a transient bug.
Historical updates haven't always gone well, so let's see what CI says.

prtest:full

* Update risc-v qemu arguments

.github/workflows/main.yml

@@ -659,7 +659,7 @@ jobs:
     name: ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     env:
-      QEMU_BUILD_VERSION: 8.1.5
+      QEMU_BUILD_VERSION: 9.1.2
     strategy:
       fail-fast: ${{ github.event_name != 'pull_request' }}
       matrix: ${{ fromJson(needs.determine.outputs.test-matrix) }}

ci/build-test-matrix.js

@@ -125,7 +125,7 @@ const FULL_MATRIX = [
     "target": "riscv64gc-unknown-linux-gnu",
     "gcc_package": "gcc-riscv64-linux-gnu",
     "gcc": "riscv64-linux-gnu-gcc",
-    "qemu": "qemu-riscv64 -cpu rv64,v=true,vlen=256,vext_spec=v1.0,Zfa=true,Zfh=true,zba=true,zbb=true,zbc=true,zbs=true,zbkb=true,zcb=true,x-zicond=true -L /usr/riscv64-linux-gnu",
+    "qemu": "qemu-riscv64 -cpu rv64,v=true,vlen=256,vext_spec=v1.0,zfa=true,zfh=true,zba=true,zbb=true,zbc=true,zbs=true,zbkb=true,zcb=true,zicond=true -L /usr/riscv64-linux-gnu",
     "qemu_target": "riscv64-linux-user",
     "name": "Test Linux riscv64",
     "filter": "linux-riscv64",