Let utilities identify themselves as being part of uutils in `--help` and `--version`

I had a tool in $PATH and needed to determine whether its from GNU coreutils/findutils/... , busybox, or uutils. While the GNU and Busybox state their origin in the --help and --version , uutils stays (mostly) silent about its origin.

Add something like part of uutils to --help and also mention uutils in the --version output.

Currently, uutils-tar only implements the indicator in the --version output.

Note: This bug is part of a series of bugreports across all tools of uutils. Please check wether I've covered all your utilities.

Related:

• https://github.com/uutils/coreutils/issues/7427
• https://github.com/uutils/coreutils/issues/12114
• https://github.com/uutils/tar/issues/273
• https://github.com/uutils/procps/issues/690
• https://github.com/uutils/util-linux/issues/538
• https://github.com/uutils/acl/issues/298
• https://github.com/uutils/findutils/issues/672
• https://github.com/uutils/sed/issues/407
• https://github.com/uutils/awk/issues/2
• https://github.com/uutils/diffutils/issues/222
• https://github.com/uutils/bsdutils/issues/128
• https://github.com/uutils/shadow-rs/issues/161
• https://github.com/uutils/hostname/issues/290

Start by locating the uutils-tar code that formats the --help and --version output, and compare the existing version indicator with the help text. Done means both outputs identify the utility as part of uutils, while checking related utilities for any missing indicator.