ci: replace RBE instance name for components-repo-unit-tests job (#42636)
ci: replace RBE instance name for components-repo-unit-tests job (#42636)

Temporarily replaces the RBE instance name for the
`components-repo-unit-tests` job until
https://github.com/angular/components/pull/23056 is available.

PR Close #42636

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