Add support for local array types in EventPipe C library. #46924
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In C++ EventPipe library implementation there where use of stack allocated CQuickArrayList instances reducing need for heap allocations. This PR adds a mechanism to declare a local array and on runtimes that support such a data type (on CoreClr it will be CQuickArrayList) it will do a stack based instead of an heap allocated instance. On runtime that don't have similar data types (like Mono), the underlying type will still be heap allocated.