* Implementation of structured logging.
These are the changes that enable the cloud backend to consume
structured logs and make use of the new plan renderer. This will enable
CLI-driven runs to view the structured output in the Terraform Cloud UI.
* Cloud structured logging unit tests
* Remove deferred logs logic, fix minor issues
Color formatting fixes, log type stop lists, default behavior for logs
that are unknown
* Use service disco path in redacted plan url
* remove attributes that do not match the relevant attributes filter
* fix formatting
* fix renderer function, don't drop irrelevant attributes just mark them as no-ops
* fix imports
* raw unmodified broken tests
* tests execute, no panics
* fix whitespace differences
* fix all the tests
* fix tests
* actually fix tests
* add missing plan metadata into the renderer
* address comments
* complete merge
* remove TODO raising questions about outputs, they are fixed
* missing bold on plan
* pause implementation
* change -> diff, value -> change
* add support for json and multiline strings to the primitive renderer
* goimports
* remove unused function
* go fmt
* address comments
