Cannot set vCPU quota to -1 on newer kernels

Software environment

• Operating system: CentOS 9 Stream
• Architecture: x86_64
• kernel version: kernel-5.14.0-105.el9.x86_64
• libvirt version: libvirt-daemon-8.3.0-1.el9.x86_64
• Hypervisor and version: qemu-kvm-core-7.0.0-4.el9.x86_64

Description of problem

On recent kernels it is not possible to set vCPU quota to -1. Libvirt fails with:

Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/vdsm/virt/vm.py", line 5572, in setCpuTuneQuota
    self._dom.setSchedulerParameters({'vcpu_quota': int(quota)})
  File "/usr/lib/python3.9/site-packages/vdsm/virt/virdomain.py", line 121, in f
    ret = attr(*args, **kwargs)
  File "/usr/lib/python3.9/site-packages/vdsm/common/libvirtconnection.py", line 131, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib/python3.9/site-packages/vdsm/common/function.py", line 94, in wrapper
    return func(inst, *args, **kwargs)
  File "/usr/lib64/python3.9/site-packages/libvirt.py", line 2818, in setSchedulerParameters
    raise libvirtError('virDomainSetSchedulerParameters() failed')
libvirt.libvirtError: Invalid value '-1' for 'cpu.max': Invalid argument

This seems to be caused by some change in cgroups v2 which does not consider negative value as valid anymore:

# echo -1 > cpu.max
-bash: echo: write error: Invalid argument

But this is also a libvirt problem because documentation clearly says:

A domain with quota as any negative value indicates that the domain has
infinite bandwidth for vCPU threads, which means that it is not bandwidth
controlled.