refactor(docs-infra): simplify Firebase redirect config (#34726)
refactor(docs-infra): simplify Firebase redirect config (#34726)

This simplifies the Firebase redirect config, removing a redundant
pattern (`/api/http`) which is covered by the previous pattern and
dropping an unused named captured segment (`:rest*`).

This change does not affect the redirection behavior for the deployed
apps, but allows the Firebase hosting emulator to work correctly.
(See [here][1] for more info.)

NOTE: Although we are not currently using the Firebase emulator for
      development/testing, we might want to use it in the future.

[1]: https://github.com/firebase/superstatic/issues/231#issuecomment-573034515

PR Close #34726

alxhub/angular,Toxicable/angular,mgechev/angular,gdi2290/angular,angular-indonesia/angular,filipesilva/angular,gnomeontherun/angular,shairez/angular,brandonroberts/angular,wKoza/angular,IdeaBlade/angular,manekinekko/angular,IdeaBlade/angular,JiaLiPassion/angular,IdeaBlade/angular,blesh/angular,filipesilva/angular,blesh/angular,gkalpak/angular,snaptech/angular,wKoza/angular,StephenFluin/angular,ocombe/angular,manekinekko/angular,mgechev/angular,gkalpak/angular,shairez/angular,shairez/angular,brandonroberts/angular,StephenFluin/angular,brandonroberts/angular,mgechev/angular,gdi2290/angular,shairez/angular,Toxicable/angular,matsko/angular,wKoza/angular,manekinekko/angular,alxhub/angular,shairez/angular,brandonroberts/angular,snaptech/angular,manekinekko/angular,JiaLiPassion/angular,gnomeontherun/angular,Toxicable/angular,filipesilva/angular,ocombe/angular,manekinekko/angular,Toxicable/angular,IdeaBlade/angular,angular/angular,matsko/angular,ocombe/angular,brandonroberts/angular,JiaLiPassion/angular,gdi2290/angular,gnomeontherun/angular,angular/angular,wKoza/angular,JiaLiPassion/angular,gdi2290/angular,wKoza/angular,mgechev/angular,wKoza/angular,angular/angular,manekinekko/angular,snaptech/angular,StephenFluin/angular,matsko/angular,ocombe/angular,alxhub/angular,brandonroberts/angular,ocombe/angular,blesh/angular,angular/angular,angular-indonesia/angular,StephenFluin/angular,filipesilva/angular,blesh/angular,Toxicable/angular,snaptech/angular,mgechev/angular,gnomeontherun/angular,snaptech/angular,IdeaBlade/angular,Toxicable/angular,angular-indonesia/angular,gdi2290/angular,angular-indonesia/angular,alxhub/angular,blesh/angular,gkalpak/angular,gkalpak/angular,gdi2290/angular,matsko/angular,matsko/angular,StephenFluin/angular,filipesilva/angular,snaptech/angular,ocombe/angular,alxhub/angular