NativeAOT EventPipe require multi byte to wide char support

[LakshanF]

EventPipe ep_rt_utf8_to_utf16le_string and ep_rt_utf16_to_utf8_string implementation currently only supports ASCII conversions. These need to support multi-byte conversions.

This recent work looks promising in terms of leveraging common code for this purpose

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Issue Details

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EventPipe ep_rt_utf8_to_utf16le_string and ep_rt_utf16_to_utf8_string implementation currently only supports ASCII conversions. These need to support multi-byte conversions.

This recent work looks promising in terms of leveraging common code for this purpose

Author:	LakshanF
Assignees:	LakshanF
Labels:	area-NativeAOT-coreclr
Milestone:	8.0.0

[am11]

I think it is possible to make EP directly call minipal_convert_utf8_to_utf16 and minipal_convert_utf16_to_utf8 APIs without duplicating the calling code for each runtime. Currently, EP for both coreclr and mono end up calling exactly the same minipal APIs via different wrappers; PAL or giconv.

[LakshanF]

Fixed with #89036