Allow TypePreserve info to be applied multiple times #103140
Merged
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Fixes #103115
Allows TypePreserve info to be applied multiple times. Pending preserve items may not be processed when the preserve info is applied, and the preserve info may be applied twice (in ProcessMarkedPending and ProcessType). If the preserve has already been applied in these cases, we will just return early rather than throwing an exception.
Adds a test that applies a preserve on an otherwise unreferenced type