feat: add FUSE support

[athith-g]

There are instances where using a FUSE is useful/essential for the completion of a TES task. For example, for tasks that use crypt4gh-encrypted files, using crypt4ghfs would allow the files to remain encrypted at rest and only be decrypted during read operations, greatly enhancing security.

Currently, using a FUSE in Docker requires the use of --cap-add SYS_ADMIN or --privileged flags, per this discussion. As such, I was able to use cryptgh4fs in a standalone docker container, but not in a TES implementation.

Ideally, a user would specify an image with a FUSE and specify a mount point to mount the FUSE in a TES request, and file operations in all the executors would be done with the FUSE. However, allowing individual executors to run in privileged mode could also be useful.