This change synchronizes the behavior of classic scripts and module scripts (`type="module"`). Module scripts are deferred by default. Also, certain injected scripts are not considered module scripts even in a ES2015+ build due to the strict mode behavior of module scripts. Deferring such scripts also ensures consistent execution in those scenarios.
`ng serve` was errantly adding a module type to custom script bundles. These scripts may contain ES5 and non-strict compatible code and can therefore not be marked as module scripts. `ng build` already correctly operates in this fashion.
Fixes#14952
The serve path represents the base of the application. Accessing a different path (`/api/` for instance) should not cause the application to load if the application's base is `/test/`
Remove the manually maintained schema.d.ts from the browser builder, and use
the Schema JSON file to generate it. This had a lot of repercussions around
the whole build-angular code base and the different interfaces that were
manually kept.
