Soft (per-process) fdlimit needs to be raised

My `mkinitcpio` Autodetect hook is failing from Kernel 7.2 with:

```
-> Running build hook: [/usr/lib/initcpio/install/autodetect]
sort: cannot read: /sys/devices/virtual/tty/tty62/uevent: Too many open files
==> WARNING: An error was encountered during device lookup. Retrying.
sort: cannot read: /sys/devices/virtual/tty/tty62/uevent: Too many open files
==> ERROR: An error was encountered during device lookup.
==> ERROR: Cannot acquire used modules. Unable to use autodetection.
```

Because my (somewhat moderate) system has 1371 `uevent` entries under `/sys/devices/*`, and the hook attempts to open them all at once:
```if uevents="$(LC_ALL=C.UTF-8 find /sys/devices -name uevent -exec sort -u {} +)"; then```

The distro already raises the hard (all-process) limit to 1M fds.

I will propose a new setting of 65535 for the soft limit, but I'm not wed to that.

Start by locating the CachyOS setting that controls the soft per-process file-descriptor limit, then review the mkinitcpio Autodetect hook at /usr/lib/initcpio/install/autodetect and its find/sort invocation. Done means the soft limit is raised without changing the hard limit and the hook can process the reported /sys/devices uevent entries without a Too many open files error.

Written by the indexing model from the issue text.