Bump base in cabal-dev-scripts.cabal (backport #9303) (#9311)

* Bump base in cabal-dev-scripts.cabal

Bump base in cabal-dev-scripts.cabal. We are now using GHC 9.4.7 in CI, which ships with base 4.17.2.0. I am bumping all the way to <4.19 after testing everything compiles with GHC 9.6.3 (base-4.18.1.0).

(cherry picked from commit 033e8e04)

* Avoid OverloadedStrings when it causes troubles

(cherry picked from commit dc08acb9)

# Conflicts:
#	Cabal-syntax/src/Distribution/Fields/Parser.hs

* doctest: provide a separate project file without -Werror (fix #9307)

This became necessary after an upgrade to GHC 9.4, which, apparently,
has a subtle change in how -W/-w-related things get interpreted.

(cherry picked from commit ccce7c3b)

* fixup! resolve a conflict

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Co-authored-by: Andrea Bedini <andrea.bedini@tweag.io>
Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>