Migrate smoke tests to use ESM Ember -- ES'Mber

[NullVoxPopuli]

Supersedes:

• Move node tests to smoke-tests and test against the ES Modules rather than the require/AMD stuff #21105

Requires:

• Add prod build via package.json#exports #21129

Will be required for:

• Run smoke-tests with and without deprecations removed #21141
• Remove AMD bundles #21132

[github-actions]

📊 Package size report   -0%↓

File	Before (Size / Brotli)	After (Size / Brotli)
Total (Includes all files)	18.6 MB / 3.6 MB	-0%↓18.6 MB / -0%↓3.6 MB
Tarball size	4.1 MB	0%↑4.1 MB

_{🤖 This report was automatically generated by pkg-size-action}