[CT-71] Restore previous behavior when a test depends on a disabled (vs. missing) resource

[jtcohen6]

Prompted by Slack threads here + here

Folks who've newly upgraded to v1.0 are seeing a lot of warn-level (stdout) messages about tests defined on disabled models. This is what our internal analytics project looks like, and I don't think it's an uncommon experience:

(There's many more below that)

It is desirable to warn about tests that have "missed" the correct model, such as due to a typo in a ref or yaml property (e.g. see #4532). It's also a very common pattern to disable unused/irrelevant models in packages, and the result is a quite cluttered terminal. There are some useful warnings in there (missing node for patch), lost as needles in haystack-traces.

What I proposed in one of the threads linked above:

If a test depends on a disabled model, log this as DEBUG-level (shows up in logs/dbt.log)
If a test depends on a missing model, log this as WARN-level (shows up in standard CLI output)

I looked quickly at the code, and turns out this was actually our previous behavior:

dbt-core/core/dbt/parser/manifest.py

Lines 790 to 803 in 08b2f16

	def invalid_ref_fail_unless_test(node, target_model_name,
	target_model_package, disabled):
	if node.resource_type == NodeType.Test:
	msg = get_target_not_found_or_disabled_msg(
	node, target_model_name, target_model_package, disabled
	)
	if disabled:
	logger.debug(warning_tag(msg))
	else:
	warn_or_error(
	msg,
	log_fmt=warning_tag('{}')
	)

We've since replaced the first of those with a call to the InvalidRefInTestNode event, so this would just look like changing:

dbt-core/core/dbt/events/types.py

Lines 1186 to 1192 in a588607

	@dataclass
	class InvalidRefInTestNode(WarnLevel):
	msg: str
	code: str = "I051"
	def message(self) -> str:
	return ui.warning_tag(self.msg)

To:

@dataclass
class InvalidRefInTestNode(DebugLevel):
    msg: str
    code: str = "I051"

    def message(self) -> str:
        return self.msg

Voila, just the good stuff:

[fivetran-sheringuyen]

I think this is a great update -- happy to be a tester if/when you need!

[leahwicz]

Backport here: #4656