Unit test binaries should accept suite name in addition to filter

Now that we've bundled multiple unit tests into large binaries, it is impossible to run a single suite within a bundled group of unit tests.

It is still possible to filter by test case, but not suite name (i.e. path/to/db_storage_test --filter MyTestCase). This is problematic because certain unit tests suites (i.e. KeyStringBuilderTest) take a very long time to run, and there is no good way to skip them.

I would like to be able to do this to preserve the original behavior:

path/to/db_storage_test --suite DurableCatalogTest