Migrated from $ENV syntax to liquid to support composite context passing

[jsoverson]

This PR:

• Removes the ability to use bash-like syntax to access ENV variables.
• Adds liquid-template support to important parts of config:
  • with: config passing
  • in resources
  • in test data
• Note: App configurations (and test config) are the only places where ctx.env is populated. Composite components must define the configuration they need rather than relying on $ENV.
• Adds root component config & operation level config definition and passing to composite components, http components, and sql components (though sql components do not have any ways of accessing this data as of this PR)
• added --op_with= cli arg to wick invoke to pass operation-level config (open to naming suggestions)