docs(animations): migrate deprecated `@whatItDoes` tag (#23210)
docs(animations): migrate deprecated `@whatItDoes` tag (#23210)

This was not being picked up by the doc-gen as it does not appear to be
part of the public API.

PR Close #23210

Toxicable/angular,vicb/angular,hansl/angular,IgorMinar/angular,shairez/angular,jonrimmer/angular,mhevery/angular,mlaval/angular,ocombe/angular,kara/angular,gnomeontherun/angular,ocombe/angular,NathanWalker/angular,mgiambalvo/angular,heathkit/angular,mzgol/angular,matsko/angular,LucasSloan/angular,mgiambalvo/angular,Brocco/angular,wKoza/angular,ValtoFrameworks/Angular-2,juristr/angular,heathkit/angular,mgol/angular,brandonroberts/angular,mlaval/angular,wKoza/angular,ultrasonicsoft/angular,trshafer/angular,vicb/angular,mzgol/angular,mgol/angular,IgorMinar/angular,trshafer/angular,gdi2290/angular,ultrasonicsoft/angular,IdeaBlade/angular,alxhub/angular,petebacondarwin/angular,wKoza/angular,jonrimmer/angular,mlaval/angular,Toxicable/angular,snaptech/angular,wKoza/angular,Brocco/angular,jonrimmer/angular,brandonroberts/angular,kegluneq/angular,kegluneq/angular,snaptech/angular,wKoza/angular,shairez/angular,JiaLiPassion/angular,Toxicable/angular,mgol/angular,matsko/angular,ocombe/angular,ValtoFrameworks/Angular-2,kegluneq/angular,sarunint/angular,kara/angular,ultrasonicsoft/angular,alxhub/angular,trshafer/angular,alexeagle/angular,manekinekko/angular,IdeaBlade/angular,angular/angular,manekinekko/angular,IdeaBlade/angular,shairez/angular,mlaval/angular,mzgol/angular,mgechev/angular,shairez/angular,kara/angular,juristr/angular,mgechev/angular,Brocco/angular,jonrimmer/angular,JiaLiPassion/angular,snaptech/angular,petebacondarwin/angular,jasonaden/angular,mgol/angular,StephenFluin/angular,jonrimmer/angular,mzgol/angular,jasonaden/angular,mgiambalvo/angular,hansl/angular,angular-indonesia/angular,vicb/angular,blesh/angular,juristr/angular,gkalpak/angular,mprobst/angular,vikerman/angular,mgiambalvo/angular,sarunint/angular,ocombe/angular,brandonroberts/angular,filipesilva/angular,petebacondarwin/angular,vikerman/angular,mprobst/angular,NathanWalker/angular,NathanWalker/angular,vikerman/angular,mgol/angular,manekinekko/angular,Brocco/angular,wKoza/angular,ValtoFrameworks/Angular-2,mprobst/angular,heathkit/angular,sarunint/angular,mhevery/angular,StephenFluin/angular,gdi2290/angular,Brocco/angular,IgorMinar/angular,juristr/angular,ultrasonicsoft/angular,mlaval/angular,mhevery/angular,filipesilva/angular,gnomeontherun/angular,alxhub/angular,sarunint/angular,JiaLiPassion/angular,StephenFluin/angular,jonrimmer/angular,alexeagle/angular,ultrasonicsoft/angular,hansl/angular,angular-indonesia/angular,kegluneq/angular,matsko/angular,jasonaden/angular,snaptech/angular,gkalpak/angular,manekinekko/angular,filipesilva/angular,StephenFluin/angular,LucasSloan/angular,heathkit/angular,mgechev/angular,brandonroberts/angular,heathkit/angular,filipesilva/angular,juristr/angular,jasonaden/angular,vikerman/angular,angular/angular,shairez/angular,mzgol/angular,blesh/angular,filipesilva/angular,manekinekko/angular,alxhub/angular,IgorMinar/angular,trshafer/angular,brandonroberts/angular,kara/angular,gkalpak/angular,mprobst/angular,mprobst/angular,IgorMinar/angular,gdi2290/angular,vikerman/angular,gkalpak/angular,LucasSloan/angular,NathanWalker/angular,kara/angular,mhevery/angular,kegluneq/angular,hansl/angular,mgechev/angular,mgiambalvo/angular,mgechev/angular,brandonroberts/angular,IgorMinar/angular,mhevery/angular,vikerman/angular,trshafer/angular,mgol/angular,mprobst/angular,Toxicable/angular,Brocco/angular,LucasSloan/angular,IdeaBlade/angular,ocombe/angular,petebacondarwin/angular,gdi2290/angular,blesh/angular,manekinekko/angular,StephenFluin/angular,sarunint/angular,NathanWalker/angular,juristr/angular,blesh/angular,Toxicable/angular,snaptech/angular,angular-indonesia/angular,mhevery/angular,kegluneq/angular,jasonaden/angular,angular-indonesia/angular,alexeagle/angular,ocombe/angular,angular/angular,matsko/angular,Toxicable/angular,angular/angular,vicb/angular,mzgol/angular,NathanWalker/angular,ValtoFrameworks/Angular-2,petebacondarwin/angular,ValtoFrameworks/Angular-2,alxhub/angular,hansl/angular,LucasSloan/angular,gnomeontherun/angular,alexeagle/angular,IdeaBlade/angular,trshafer/angular,blesh/angular,heathkit/angular,jasonaden/angular,LucasSloan/angular,JiaLiPassion/angular,gdi2290/angular,hansl/angular,alexeagle/angular,sarunint/angular,petebacondarwin/angular,matsko/angular,kara/angular,gnomeontherun/angular,gdi2290/angular,vicb/angular,vicb/angular,ultrasonicsoft/angular,snaptech/angular,alexeagle/angular