Synchronise the signature of `sqlite3.connect? and `sqlite3.Connection.__init__`

[erlend-aasland]

See #93057 (comment):

[...] we have some technical dept when it comes to sqlite3.connect and sqlite3.Connection.__init__. Currently, the latter uses clinic, and the former does not use clinic. However, it is sqlite3.connect that needs the docstring, not sqlite3.Connection.__init__. We should make it so that the docstring from sqlite3.Connection.__init__ is used for sqlite3.connect and output to a separate file, for inclusion by Module/_sqlite/module.c.

Previously, the two argument specs needed to be kept in sync manually. Some fairly recent changes improved this, but we still need to keep the docstring and methoddef of sqlite3.connect up to date manually.

Linked PRs

• gh-107938: Synchonise the signature of of sqlite3.connect and sqlite3.Connection.__init__ #107939
• [3.12] gh-107938: Synchonise the signature of of sqlite3.connect and sqlite3.Connection.__init__ (GH-107939) #107943
• [3.11] gh-107938: Synchonise the signature of of sqlite3.connect and sqlite3.Connection.__init__ (#107939) #107946