RFR: Workaround CacheDataStore use with source launcher [v2]

[Aleksey Shipilev]

On Fri, 6 Sep 2024 16:17:47 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> So _not_ doing `--add-modules` when CDS is enabled is a convenience for performance testing, plus a breadcrumb for future work.

We can move this check to VM, but it is not convenient to figure our if we are running in `LM_SOURCE` mode or not on the VM side.

-------------

PR Comment: https://git.openjdk.org/leyden/pull/15#issuecomment-2334410780