[FEATURE] Make deprecations throw when the until for ember-source has passed

[kategengler]

• Add a new deprecateUntil that checks whether a deprecation has been removed and throws if it has. This explicitly uses throw and not assert so that it will remain in production builds. This function should be used internally in ember-source in place of deprecate.
• Add utilities testIf and testUnless to guard tests based on whether a deprecation has been removed. Uses this for the existing deprecation on @ember/routing
• Add a query param to tests overridedeprecationversion that takes a version to be the current version for removing deprecation purposes
• Add a CI build to use the above to test with deprecations broken

For https://rfcs.emberjs.com/id/0830-evolving-embers-major-version-process

[chancancode]

@kategengler @ef4 I have a question: does this still get stripped correctly in prod build? looking at just the code here, it's not obvious it would – but maybe the code that handles that is out-of-tree somewhere else?

[kategengler]

@chancancode No, it does not ... the deprecate within deprecateUntil should be stripped but the throw should remain because we want to actually break the APIs at the until

[shama]

After upgrading to ember-source@5.9.0 I now see hundreds of deprecation messages in the terminal when running ember build/serve. Is this expected? Is there a way to silence or figure out where these deprecations are originating from?

DEPRECATION: The parts property on path nodes is deprecated, use head and tail instead
DEPRECATION: The 'Program' visitor node is deprecated. Use 'Template' or 'Block' instead (node was 'Block') 
DEPRECATION: The parts property on path nodes is deprecated, use head and tail instead
DEPRECATION: The parts property on path nodes is deprecated, use head and tail instead
DEPRECATION: The this property on path nodes is deprecated, use head.type instead
DEPRECATION: The parts property on path nodes is deprecated, use head and tail instead

[kategengler]

@shama This is not related to this PR -- this PR makes deprecations throw when the until is passed, so when ember-source 6.0 is released, deprecations with an until of 6.0 will throw immediately so that we can take our time garbage collecting the old code.

The deprecations you are referencing are not from ember-source (they print on the command line). These deprecations came from @embroider/macros and were handed in this PR embroider-build/embroider#1967 and released in v1.16.3 of that package.

[shama]

@kategengler My bad, thank you for pointing me to that embroider issue!