re-allow symbol-graph-dir and supplementary file map #36981
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Resolves rdar://76815547
The new swift-driver does not have a port of #36542, which is causing issues in the same way that the old driver had when using whole-module optimizations (or other situations where file maps were being used). This PR re-allows
-emit-symbol-graph-dir
and-supplementary-output-file-map
at the same time, to allow the new driver to use the frontend before it is properly updated.