Updated test workflow to verify certificate update process

[agazeley]

The change enables the testing of both certificate updates

Changes to test procedure:

• Bump action versions to 'v0.2.0'
• Add update of nginx certificate where we modify the virtual paths with the GITHUB_RUN_ID to ensure each run is uniquely verifiable. This is a long lived certificate in our AKV instance
• Add additional sed command to update multi file config w/ GITHUB_RUN_ID in path of certificate
• Add steps for creating cert file from AKV cert and verifying NGINX endpoint can use cert and returns correct header for GITHUB_RUN_ID

Potential Enhancements:

• Use config update and cert update in tandem
• Perform updates to multiple certificates