[cdac] Implement ISOSDacInterface::GetModule and IXCLRDataModule::GetFileName

[elinor-fung]

• Add ClrDataModule to cDAC as its implementation of IXCLRDataModule and IXCLRDataModule2
  • Delegates to legacy implementation for everything except for GetFileName
  • Implements ICustomQueryInterface to handle QI-ing the legacy DAC for IMetaDataImport
• Implement ISOSDacInterface::GetModule
  • Gets a module from the legacy DAC and passes it to the cDAC ClrDataModule
• Cache the module file name on Module
  • Update comments around how it is expected to be set
• Add GetFileName to Loader contract
• Implement IXClrDataModule::GetFileName

Contributes to #99302, #108553

cc @AaronRobinsonMSFT @davidwrighton

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