runner: module specifier `"./sub"` of dynamic import has no symbol

[sandersn]

declarationEmitDoesNotUseReexportedNamespaceAsLocal

• also affects following expressions' symbols, maybe it's not resolved at all: declarationEmitExportAliasVisibilityMarking (and others)

[sandersn]

This is a minor difference that should be ignored by a baseline compatibility mode: the string in a dynamic import has is an alias symbol in Strada but not in Corsa. I'm pretty sure this is a good simplification because the Strada symbol looks to me synthetic and special to dynamic imports.

There are some other failures in the same tests, but they're duplicates of #312 that causes --lib not to work.