Has non empty accname

[Jym77]

Update rules names, descriptions, and filenames from "has accessible name" to "has non-empty accessible name". + add note about non testing if accessible name is descriptive for the only rule that was missing it.

Closes issue(s):

• closes Consider renaming the "has acc name" rules to "has non-empty acc name" #1220

Need for Final Call:
This will need a 1 week Final Call.

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[WilcoFiers]

Can you also remove the "Testing that the [accessible name] describes..." notes? I don't think we need those anymore with this change.

[WilcoFiers]

Also, I think we should do a 1 week final call for this @Jym77. I know strictly we're not required to, but this is a fairly important change.

Removed the note.

[Jym77]

Final Call ends on May 20.

[Jym77]

Final Call has ended. Merging.