Description of problem:

dnf5 bash completions only work if you use the "dnf5" version of
the command (not "dnf", the usual alias).  eg:

$ dnf5 install bas<TAB>
basesystem       bash-argsparse   bash-doc         
basez            bash-completion  bashmount        
bash             bash-devel       bastet   

$ dnf install bas<TAB>
(nothing is printed)

The reason is because /usr/share/bash-completion/completions/dnf5
references the command name as "dnf5", see the last line of this file.

Version-Release number of selected component (if applicable):

dnf5-0:5.0.15-4.fc39.x86_64

How reproducible:

100%

Steps to Reproduce:

(see above)