Previously, camel case was used for bazel labels in the devtools directory. This commit changes these labels to snake case except in the case where the label is identical to the directory name that the BUILD file is in.
These keyword args are not needed because `ts_project` and `ng_ts_project` already default to the tsconfig at the root of the devtools directory.
This commit removes these key word args from places where tsconfig was used as a keyword arg with the root level tsconfig as the target.
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.
