fix: manually configure supported env vars

[j-luong]

Pull Request Submission Checklist

• Follows CONTRIBUTING guidelines
• Includes detailed description of changes
• Contains risk assessment (Low | Medium | High)
• Highlights breaking API changes (if applicable)
• Links to automated tests covering new functionality
• Includes manual testing instructions (if necessary)
• Updates relevant GitBook documentation (PR link: ___)

Risk Assessment - Medium

The existing behaviour, although not correct, may be used by clients without knowing that it's unintentional. This would lead to breaking changes for them. The fix for them would be to use the intended env var for their purpose.

What does this PR do?

This PR updates the CLI so that it no longer automatically detects supported env vars. The automatic detection led to bugs where ambiguous environment variables (e.g. ORG) would be picked up and used in the CLI.

By explicitly configuring the supported env vars, we can avoid these sorts of bugs (e.g. by requiring namespace prefixes in env vars we want to support).

Where should the reviewer start?

Review the related GAF PR

How should this be manually tested?

[github-actions]

	Warnings
⚠️	Since the CLI is unifying on a standard and improved tooling, we're starting to migrate old-style imports and exports to ES6 ones. A file you've modified is using either module.exports or require(). If you can, please update them to ES6 import syntax and export syntax. Files found: test/jest/acceptance/iac/capture.spec.ts

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