ec4381d explicitly set `enableIvy: false` for all migrations inside
the core package. This actually hides migration issues because the
migration itself should ensure that it instantiates the right
compiler program if it relies on `@angular/compiler-cli`.
We should remove these options from all migration tests to
ensure that we catch issues with migrations running in version
9 where Ivy is enabled by default.
e.g. https://github.com/angular/angular/commit/e5636a322ccaa87faac9b2126c45f97cf76bc114
was accidentally hidden due to the `enableIvy: false` option.
PR Close#32954
Paul Gschwendtner
90dda5873a