Update makefile to use pip installed dependencies

[loftiskg]

What this PR does / why we need it:
First-time contributor here. I noticed that when I was running through the list of things in CONTRIBUTORS.md to set up my dev environment, I ran make lint and make format and a whole bunch of files were changes. Turns out that the black being used in my local setup was not the same the version of the one installed with dev dependencies. Since black is called directly as a CLI command rather than as a python module in the make command, it uses my system default rather than the one installed via pip install -e 'sdk/python[ci]'. This would also apply to the other python linting tools utilized in the make file as well (ie mypy, isort, etc). So to ensure that the correct versions of everything are used I changed the makefile to execute black and other python installed CLI tools as python modules.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[feast-ci-bot]

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[codecov-commenter]

Codecov Report

Merging #1920 (29b93a8) into master (0155284) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1920   +/-   ##
=======================================
  Coverage   82.97%   82.97%           
=======================================
  Files          96       96           
  Lines        7376     7376           
=======================================
  Hits         6120     6120           
  Misses       1256     1256           

Flag	Coverage Δ
integrationtests	74.41% <ø> (ø)
unittests	60.64% <ø> (ø)

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[achals]

/lgtm

Thanks for the fix @loftiskg !

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: achals, loftiskg

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[felixwang9817]

/kind bug