[CI] fix pip install

[aclegg3]

Motivation and Context

Fixes the current emergent CI issue with pip install.

Not sure of exact details, but it appears the behavior or routing of cd - resulted in pip installation targeting the root directory '/home/circleciinstead of the expected/home/circleci/project` directory containing the cloned repo.

Emergent permission issues in /opt/circleci/.pyenv/ suspected of being part of the problem.

Empirical solution was to skip the initial setup and route directly to project/ directory for pip installation.

How Has This Been Tested

CI

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have completed my CLA (see CONTRIBUTING)
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.