TestBed aotSummaries

[X] feature request

Apparently, Angular added a feature called `aotSummaries` to `TestBed.initTestEnvironment()` at some point (https://angular.io/api/core/testing/TestBed#initTestEnvironment). But the docs are pretty sparse. Could the seed be updated to support these? Apparently, it makes unit tests run much faster because the HTML templates aren't constantly recompiled for every spec method.

Start by locating the seed's TestBed.initTestEnvironment setup and read Angular's aotSummaries API documentation. Determine how the test environment is initialized and verify the change with the seed's existing unit-test workflow; done means the seed supports the requested option and tests still run correctly.

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