bash-completion: upgrade 2.14.0 -> 2.15.0

bash-completion: upgrade 2.14.0 -> 2.15.0

Changelog:
===========
* _comp_abspath:** handle ".."
* _comp_compgen_filedir,_comp_compgen_filedir_xspec:** don’t suggest . nor .. nor */. nor */.. unless the user input is .. or */..
* associate unzip and friends with *.vsix
* curl:** Complete "%", "-" for --trace[-ascii]
* curl:** Complete files for --json, --write-out
* curl:** Complete stdin "-" in file locations
* fprintd-*:** new completions
* iftop:** -G, -s, -L, and -o arg (non-)completions
* ip:** complete ip ntable show
* java:** enable .java filename completion for java command
* kata-runtime:** add 3rd party fallback completion loader
* nerdctl:** add 3rd party fallback completion loader
* ngrok:** add 3rd party fallback completion loader
* openssl:** Stop having subcommands hardcoded
* python,pyvenv:** versioned 3.13 executable support
* set:** more featureful completion
* slabtop:** new completion
* sops:** add 3rd party fallback completion loader
* tar:** use long option compression options
* todoist:** add 3rd party fallback completion loader
* uv:** add 3rd party fallback completion loader
* uvx:** add 3rd party fallback completion loader
* wine:** complete with '*.bat' and '*.cmd'
* xv:** associate with *.webp and *.pnm
* xxd:** add -n, -o, and -R arg (non-)completions
* _comp_compgen:** use 'compgen -V array_name' in 'bash >= 5.3'
* _comp_expand_glob:** set LC_COLLATE for the sorting order
* _comp_expand_glob:** work around GLOBSORT in Bash 5.3
* compatdir:** use _comp_expand_glob for the correct order
* curl:** Complete all and category for --help
* dpkg:** Add missing short option -R
* rsync,ssh:** do not overescape spaces in remote filenames
* source files using absolute paths for absolute BASH_SOURCE
* tar:** Complete added files with long opts
* update-alternatives:** fix the "--help" parsing

Signed-off-by: Wang Mingyu <wangmy@cn.fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>