Update requirements_dev.txt to improve contributor workflow

[juliusgeo]

This change makes it so that you can get from cloning the repo to running the tests in only 3 commands:

pip install -r requirements_dev.txt 
python setup.py develop --tiledb=<tile-db path>
python -m pytest tiledb

The version numbers that I put in are just the latest version, as I am not sure what the correct minimum version is.

[johnkerl]

Can we get this stanza into a dev section in README.md?

pip install -r requirements_dev.txt 
python setup.py develop --tiledb=<tile-db path>
python -m pytest tiledb

[kounelisagis]

Should be 2 commands after https://github.com/TileDB-Inc/TileDB-Py/pull/1988:

pip install -e '.[test]' -C skbuild.cmake.define.TILEDB_PATH=/home/tiledb/dist
python -m pytest tiledb