fix: proxy SSL CONNECT issues with openwhisk library

[shazron]

Description

When doing an aio app deploy and an HTTPS_PROXY environment var is set, the aio-cli does not connect to the proxy properly via a SSL CONNECT method, and it gets rejected by a corporate proxy.

Related Issue

See https://jira.corp.adobe.com/browse/IOEXT-1608

Motivation and Context

Enable the aio-cli to connect to proxy servers correctly via SSL CONNECT.

How Has This Been Tested?

1. clone @adobe/aio-cli-plugin-app, and this repo, at this PR branch
2. in the @adobe/aio-cli-plugin-app repo folder, use npx link AIO_LIB_RUNTIME_PR_BRANCH_FOLDER_PATH [1]
3. in the @adobe/aio-cli-plugin-app repo folder:
   a. npm install
   b. aio plugins link .
4. run Charles Web Proxy (it should run at http://localhost:8888)
5. Create an App Builder project
6. deploy it via the proxy by calling: HTTPS_PROXY=http://localhost:8888 aio app deploy
7. Observe in the Charles Web Proxy window, all connections should use the method CONNECT
8. deploy it without the proxy by calling: http://localhost:8888 aio app deploy
9. No connections should be logged in the Charles Web Proxy window

Types of changes

• 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:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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