[ddc] Emit call to register source maps in DDC library bundle format

- Sets the name field in the emitted LibraryBundle node to
to the provided module name. We tried to avoid providing a
module name as the notion doesn't map cleanly to library
bundles, but we need to respect the provided module name.
- Emits a call to set the source map for a given library
bundle url. We don't need the full trackLibraries call so we
don't use it.
- Adds a check to avoid redefining libraries outside of a hot
reload or a hot restart. This was handled in the same code
where we emitted trackLibraries calls in the old compiler
for dynamic modules, but we want this for all code, regardless
of whether dynamic modules is enabled. So, add this check in
the library manager instead.

Change-Id: Ic4e86dbfca2b3eefa99cce44fae0973164ab77a5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423620
Reviewed-by: Nicholas Shahan <nshahan@google.com>