fix: Install pip and pip-tools in upgrade script

[Jawayria]

Updated the upgrade target script to check the compatibility of upgraded pip and pip-tools versions.
For reference, look at this PR for new check added in edx-repo-health.
JIRA: https://2u-internal.atlassian.net/browse/BOM-3422

[codecov]

Codecov Report

Merging #216 (2e544f5) into master (c9cc8ef) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #216   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines          412       412           
  Branches        64        64           
=========================================
  Hits           412       412           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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