fix(dev-infra): allow for deep merging of pullapprove config aliases (#36915)
fix(dev-infra): allow for deep merging of pullapprove config aliases (#36915)

Set the yaml parser to support deep merges of yaml aliases,
to support having a default value for all rules to build upon.

PR Close #36915

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