Update the devguide on how to build with Homebrew supplied sqlite3 and zlib

[erlend-aasland]

The devguide does touch on how to build Python from source using homebrew installed libraries on macOS, although I found it to be 1) a bit incomplete; 2) not so easy to discover.

[...] I'd like to at least update the devguide to include details on how to also build sqlite3 and zlib modules.

Originally posted by @warsaw in https://github.com/python/cpython/issues/75457#issuecomment-1093756893