Missing visible long flag aliases in help

[GilShoshan94]

I just found something strange, in this function sc_spec_vals for the aliases of the Command, I see we have 3 types:

• aliases -> and we show them in the help with .get_visible_aliases()
• short_flag_aliases -> with .get_visible_short_flag_aliases()
• long_flag_aliases -> with .get_visible_long_flag_aliases()

The visible aliases and the short flag ones are collected, but the long flag aliases are forgotten.

Originally posted by @GilShoshan94 in #6057 (comment)

[GilShoshan94]

This was overlooked in #1974 and it is taken care of in PR #6068 as a minor fix in a commit