test(core): refactor ApplicationInitStatus tests to avoid TestBed side-effects (#33222)
test(core): refactor ApplicationInitStatus tests to avoid TestBed side-effects (#33222)

Currently TestBed (both ViewEngine and Ivy) invoke `ApplicationInitStatus.runInitializers` as a part of the
bootstrap process to mimic real bootstrap steps. This is problematic for the `ApplicationInitStatus` class
tests since the `runInitializers` call performed by TestBed interfere with actual tests.

This commit updates ApplicationInitStatus tests to interact with the class directly instead of relying on TestBed
APIs to retrieve the class though DI.

PR Close #33222

shairez/angular,angular-indonesia/angular,ocombe/angular,alxhub/angular,gnomeontherun/angular,mgechev/angular,angular-indonesia/angular,brandonroberts/angular,manekinekko/angular,mgechev/angular,angular/angular,angular/angular,mgechev/angular,manekinekko/angular,alxhub/angular,gkalpak/angular,alxhub/angular,mgechev/angular,brandonroberts/angular,gkalpak/angular,angular-indonesia/angular,ocombe/angular,brandonroberts/angular,angular/angular,gnomeontherun/angular,gnomeontherun/angular,JiaLiPassion/angular,mgechev/angular,gkalpak/angular,brandonroberts/angular,manekinekko/angular,JiaLiPassion/angular,gkalpak/angular,shairez/angular,JiaLiPassion/angular,JiaLiPassion/angular,ocombe/angular,angular/angular,ocombe/angular,shairez/angular,alxhub/angular,gnomeontherun/angular,shairez/angular,alxhub/angular,ocombe/angular,brandonroberts/angular,manekinekko/angular,angular-indonesia/angular,ocombe/angular,manekinekko/angular,brandonroberts/angular,shairez/angular,manekinekko/angular