Add support for FUSE-T on macos

[macos-fuse-t]

Add support for user space fuse (FUSE-T) on macos.
FUSE-T doesn't require installation of kernel extensions (KEXT) as opposed to osxfuse.
Details of the project can be found here: https://github.com/macos-fuse-t/fuse-t
To install FUSE-T use brew:
brew tap macos-fuse-t/homebrew-cask
brew install fuse-t

Relevant Issue (if applicable)

Details

Change autoconf to discover and use FUSE-T if present, otherwise fallback to osxfuse

[gaul]

@macos-fuse-t Please investigate CI failures.

@ggtakec fuse-t is an alternate FUSE implementation based on the macOS NFS client. In addition to a newer and maintained code base, this may give us a better path forward in CI which cannot use kexts.

[macos-fuse-t]

please re-run CI

[gaul]

leap has a newer cppcheck version with new warnings which we encountered with Ubuntu 23.04 as well. I looked into this but suppressing some false positives was not easy and I need to look more carefully.

[gaul]

Thank you for your contribution @macos-fuse-t! Please update the README with newer Homebrew instructions if you package this.

[ggtakec]

@macos-fuse-t Thank you for the corresponding PR of fuse-t!
I will prepare and post a PR to restore macos testing to the CI process.
(However since an error is output, it will be necessary to investigate the cause)

[macos-fuse-t]

@ggtakec Sure, I will investigate the failures if any

[ggtakec]

@macos-fuse-t Thanks for your kindness.
I created a draft PR for #2198.
It looks like some tests are still failing, so I'll try to debug these.

[gaul]

@macos-fuse-t Does FUSE-T support the FUSE3 API?

[macos-fuse-t]

No, fuse3 APIs are not supported at this moment. Future support is planned though.