ci: exclude **/third_party/** from google3 check (#28870)
ci: exclude **/third_party/** from google3 check (#28870)

this pattern is being excluded in copybara. see cl/234807990.

PR Close #28870

jasonaden/angular,gkalpak/angular,matsko/angular,angular/angular,ocombe/angular,blesh/angular,shairez/angular,alxhub/angular,mprobst/angular,mgechev/angular,vikerman/angular,brandonroberts/angular,alxhub/angular,snaptech/angular,alexeagle/angular,alexeagle/angular,angular-indonesia/angular,mprobst/angular,wKoza/angular,mprobst/angular,Brocco/angular,filipesilva/angular,Brocco/angular,IdeaBlade/angular,mprobst/angular,blesh/angular,petebacondarwin/angular,manekinekko/angular,Brocco/angular,petebacondarwin/angular,wKoza/angular,mhevery/angular,IdeaBlade/angular,gnomeontherun/angular,StephenFluin/angular,hansl/angular,wKoza/angular,Brocco/angular,mlaval/angular,shairez/angular,shairez/angular,snaptech/angular,angular/angular,mlaval/angular,sarunint/angular,ocombe/angular,manekinekko/angular,gnomeontherun/angular,gdi2290/angular,gkalpak/angular,mprobst/angular,snaptech/angular,manekinekko/angular,JiaLiPassion/angular,vikerman/angular,manekinekko/angular,blesh/angular,wKoza/angular,petebacondarwin/angular,Toxicable/angular,mhevery/angular,juristr/angular,ocombe/angular,alxhub/angular,IgorMinar/angular,jasonaden/angular,angular-indonesia/angular,jasonaden/angular,snaptech/angular,ocombe/angular,blesh/angular,filipesilva/angular,petebacondarwin/angular,IdeaBlade/angular,juristr/angular,mhevery/angular,brandonroberts/angular,angular/angular,sarunint/angular,alexeagle/angular,hansl/angular,hansl/angular,mlaval/angular,matsko/angular,StephenFluin/angular,vikerman/angular,brandonroberts/angular,sarunint/angular,matsko/angular,angular/angular,JiaLiPassion/angular,StephenFluin/angular,gdi2290/angular,alexeagle/angular,vikerman/angular,alxhub/angular,alexeagle/angular,brandonroberts/angular,wKoza/angular,mgechev/angular,mhevery/angular,mhevery/angular,IdeaBlade/angular,hansl/angular,Brocco/angular,jasonaden/angular,gnomeontherun/angular,JiaLiPassion/angular,jasonaden/angular,mhevery/angular,Toxicable/angular,alexeagle/angular,hansl/angular,shairez/angular,manekinekko/angular,matsko/angular,angular-indonesia/angular,alxhub/angular,Brocco/angular,IgorMinar/angular,petebacondarwin/angular,blesh/angular,petebacondarwin/angular,gkalpak/angular,snaptech/angular,JiaLiPassion/angular,mlaval/angular,StephenFluin/angular,filipesilva/angular,gnomeontherun/angular,filipesilva/angular,juristr/angular,IgorMinar/angular,hansl/angular,mprobst/angular,IdeaBlade/angular,sarunint/angular,IgorMinar/angular,mgechev/angular,mlaval/angular,snaptech/angular,gdi2290/angular,juristr/angular,gdi2290/angular,StephenFluin/angular,angular-indonesia/angular,sarunint/angular,manekinekko/angular,Toxicable/angular,gdi2290/angular,sarunint/angular,matsko/angular,wKoza/angular,ocombe/angular,IgorMinar/angular,ocombe/angular,shairez/angular,juristr/angular,mgechev/angular,mgechev/angular,jasonaden/angular,brandonroberts/angular,vikerman/angular,brandonroberts/angular,IgorMinar/angular,filipesilva/angular,vikerman/angular,Toxicable/angular,Toxicable/angular,juristr/angular,gkalpak/angular,Toxicable/angular,gdi2290/angular