This commit improves the cache names generated by the ServiceWorker by
making them shorter and non-repetitive. In particular, the following
changes are made:

- Data-group cache names no longer include the `dynamic` infix, since it
  does not add any value.
  Before: `ngsw:<...>:data:dynamic:<...>`
  After:  `ngsw:<...>:data:<...>`

- `CacheDatabase` table names no longer include the `ngsw:<path>` prefix
  twice.
  Before: `ngsw:<path>:db:ngsw:<path>:<...>`
  After:  `ngsw:<path>:db:<...>`

NOTE 1:
This change will result in different cache names being generated for the
same app-versions with the new SericeWorker script. This means that some
of the previously cached data will need to be re-downloaded (because the
ServiceWorker will not be able to re-use the old caches), but that
should be transparent for the end user.
While possible, adding logic to allow the ServiceWorker to retrieve data
from the old caches is not worth the extra complecity and maintenance
cost.

NOTE 2:
Generating different cache names for some of the caches means that the
ServiceWorker will not be able to clean-up some of the old caches. This
will be taken care of in a subsequent commit that will rework the
clean-up logic to be more robust (covering changes such as this one and
other edgecases).

PR Close #42622