Ensure createdump works with NativeAOT applications

[LakshanF]

Tracking issue for some work needed on CreateDump to work in NativeAOT,

• Not to load the DAC
• Remove dependencies on PAL/DAC functions
• Createdump on a NativeAOT app crash when env variables are set

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Issue Details

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Tracking issue for some work needed on CreateDump to work in NativeAOT,

• Not to load the DAC
• Remove dependencies on PAL/DAC functions
• Createdump on a NativeAOT app crash when env variables are set

Author:	LakshanF
Assignees:	mikem8361
Labels:	area-Diagnostics-coreclr
Milestone:	-

[mikem8361]

This PR address the first 2 items: #88802