support custom image format

[fix] fix the bug where RuntimeInitClassCCtor was executed during Int…

…erpreterModule::GetInterpMethodInfo. This caused the type static constructor to be incorrectly executed prematurely during PrejitMethod.

[fix] update `frame->ip` when call native method.

[new] support transform call PInvoke method

[fix] fix the bug that doesn't lock g_MetadataLock in PDBImage::Setup…

…StackFrameInfo

[change] remove unnecessary `frame->ip = (byte*)ip;` assignment in LO…

…AD_PREV_FRAME()

[opt] opt InitLocals and InitInlineLocals in small size cases

[fix] fix the bug that didn't call RegisterInterpreterAssembly for un…

…loadable assembly

[fix] fixed the bug in ClassFieldLayoutCalculator where it failed to …

…correctly handle [StructLayout] and blittable attribute when calculating the layout for structs.

[new] calli supports call both native function pointer and managed me…

…thod