[cDAC] Implement GetGenerationTable and GetFinalizationFillPointers

[noahfalk]

Just tracking implementing yet more DAC APIs, GetGenerationTable
and GetFinalizationFillPointers.

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[MihuBot]

I'm a bot. Here is a possible duplicate issue (I may be wrong):

• [cDAC] Support API's used by CLRMD #124535

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