Formats the entire devtools directory with the ng-dev formatting tool. Previously we relied on prettier, so this commit also remove prettier from devtools' dependencies.
Uses `cy.contains` as one command to optimize cypress' retry-ability mechanism
Affected tests are in:
`property-update.e2e.js` and `view-component-metadata.e2e.js`
Previously, we were using ngx-build-plus with a custom webpack config to determine the git SHA at runtime.
Now, after migrating to bazel and transfering to angular/angular, this commit uses ng-dev to stamp the latest git SHA directly in angular devtools' application environment.
This commit also removes the old webpack configs.
