Remove wrong cgroups assert

[janvorli]

When detecting the current cgroup version on Linux, checked and
debug builds assert when the filesystem type of /sys/fs/cgroup is
neither TMPFS_MAGIC nor CGROUP2_SUPER_MAGIC. This change removes
the assert and considers it as "no cgroup support". This is the case
e.g. in chroot environment.
Release builds already have this behavior.

Close #62960

[omajid]

Thanks!

[MichalStrehovsky]

Could you also fix up the third fork of this file here?

runtime/src/coreclr/nativeaot/Runtime/unix/cgroup.cpp

Line 108 in b2dc37b

assert(!"Unexpected file system type for /sys/fs/cgroup");

[janvorli]

Ah, I have forgotten that nativeaot had one too.

[janvorli]

@dotnet/dnceng The test legs finished running already, but the build analysis shows a page saying that once the tests complete, the analysis will be there. Is that a known issue? I have restarted a leg before, so it might be related.

[riarenas]

@janvorli Build analysis suffered an outage that was fixed around 3:10 PM PT. As far as I understand, the analysis will be lost for builds completed while the outage was ongoing.

[janvorli]

There are two libraries tests that keep failing on Windows in the legs of this CI. I've tried to restart the tests, but they still failed. Since my change is in purely Unix code, I'm merging it.