[ORC] Pass JITDispatchHandler argument buffers as WrapperFunctionBuffer. #173334
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Updates ExecutionSession::runJITDispatchHandler to take the argument buffer for the function as a WrapperFunctionBuffer, rather than an ArrayRef<char>. This is a first step towards more efficient jit-dispatch handler calls: 1. Handlers can now be run as tasks, since they own their argument buffer (so there's no risk of it being deallocated before they're run) 2. In in-process JIT setups, this will allow argument buffers to be passed in directly from the ORC runtime, rather than having to copy the buffer.
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Updates ExecutionSession::runJITDispatchHandler to take the argument buffer for the function as a WrapperFunctionBuffer, rather than an ArrayRef.
This is a first step towards more efficient jit-dispatch handler calls: