feat: switch to Ivy

[gregmagolan]

Replaces #406 & #482

Issues remaining:

1. yarn_install/npm_install doesn't automatically detect umd bundles when using ivy (since its test of APF depends on finding .metadata.json files) so these are not automatically added to devmode rules such as ts_devserver & ts_web_test_suite. @kyliau is working on this (ci: Add ANGULAR_PACKAGE to snapshot builds angular#31900).

NB: 9.0.0-next.2 ivy-ngcc now correctly transforms UMD bundles in npm deps such as @ngrx which are used by ts_devserver & ts_web_test_suite rules. See angular/angular#31394.

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[CaerusKaru]

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[alexeagle]

moving this repo to rules_nodejs in bazel-contrib/rules_nodejs#1124
please reopen pull requests there