Multi-environment encryption key & team member separation

[joelgallant]

Provides a backwards compatible model for teamMembers and encryptionKeys that respects and segregates the current environment that's active.

Before landing:

• [x] Using / passing the environmentOptions defined by meta file through into encryption
• [x] Using parsing context in the encryption parsing extension
• [ ] Make encryption key IDs unambiguous across different environments - don't reuse the same IDs
• [ ] E2E encryption workflow tests for multi-environment setup
• [ ] Deciding the correct way to handle untrusting team members when using multi-env
• [ ] Updates for documentation to reflect this capability
• [ ] Unit testing the functions that accept environmentOptions
• [ ] Unit testing for encryption parsing extension using environment-specific team members
• [ ] Robust options in any related CLI commands
• [ ] Provide support for suffixed environment variable keys (APP_CONFIG_SECRETS_KEY_PROD)
• [ ] Beta testing w/ launchcode

Closes #105