feat: Support Angular Ivy modules with AOT

[DimitarTachev]

The changes are based on the ones in the Angular CLI - angular/angular-cli@7347d88#diff-6b9947d457bac2310a5d25e102697423R85

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What is the current behavior?

The AOT transformer is always changing the bootstrap call to bootstrapModuleFactory which is not valid for Ivy compatible modules.

What is the new behavior?

The transformer is using bootstrapModule or bootstrapModuleFactory based on the enableIvy flag.

Connected to #827