SERVER-110068: Modernize dynamic module loading to work with Python3.12

[fliiiix]

import imp was removed from Python 3.12 which prevents the building of mongodb. Tested in FreeBSD ports.

[fliiiix]

(I tried to create a jira ticket but the login didn't work for me so if there is a ticket needed i would appreciate if someone else can create that)

[SinghCod3r]

@fliiiix, i want to work on this please assign this to me.

[fliiiix]

@SinghCod3r What do you mean????

[kelly-cs]

SCons was removed, but I think this is still an issue. Leaving this PR open and bumping SERVER-110068.

I saw you already signed the contributor's agreement, thanks!

[kelly-cs]

Aside: Publicly we only support Python 3.10 right now for building MongoDB

[fliiiix]

It's also deprecated in Python 3.10 :) And i build it on FreeBSD with Python 3.12 🙈