fix(@ngtools/webpack): improve resource loader caching
fix(@ngtools/webpack): improve resource loader caching

This change reduces the complexity of the component resource loader caching as well as moves the caching check earlier in the workflow to further minimize the amount of processing needed.

catull/angular-cli,clydin/angular-cli,Brocco/angular-cli,Brocco/angular-cli,ocombe/angular-cli,catull/angular-cli,geofffilippi/angular-cli,ocombe/angular-cli,angular/angular-cli,Brocco/angular-cli,geofffilippi/angular-cli,ocombe/angular-cli,Brocco/angular-cli,clydin/angular-cli,ocombe/angular-cli,clydin/angular-cli,angular/angular-cli,geofffilippi/angular-cli,angular/angular-cli,clydin/angular-cli,geofffilippi/angular-cli,ocombe/angular-cli,catull/angular-cli,catull/angular-cli,Brocco/angular-cli,angular/angular-cli