[Runtime][PipelineExecutor] Refactor PipelineExecutor.py and Add cross compile support for pipeline executor. #11133
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Issue: #8596
RFC: apache/tvm-rfcs#14
Current pipeline_executor and pipeline_executor_build stay in the same file, this caused that the the running of pipeline_executor need the support from tvm and relay that is not available on edge device in which a runtime library only can get build.
Pipeline executor used PipelineExecutorFactory to store the pipeline configuration and export the pipeline executor library, but the current export not support the cross compile, add related logic.