AOT ABI reminder

[yamt]

there are a few things which we can clean up when we break AOT ABI. this issue is a reminder for them.

• merge WASMModuleInstanceExtraCommon into WASModuleInstance
• https://github.com/bytecodealliance/wasm-micro-runtime/blob/48b71a05fbbee26524e50a5d1df0ca77cb39e580/core/iwasm/common/wasm_shared_memory.c#L16-L17
• https://github.com/bytecodealliance/wasm-micro-runtime/issues/2469
• https://github.com/bytecodealliance/wasm-micro-runtime/issues/2512
• simpler xip detection https://github.com/bytecodealliance/wasm-micro-runtime/pull/2739#discussion_r1387547550
• reconsider string-based representation of exceptions
• it would be nicer to have a cheaper way to detect the embedded ELF for aot-debug so that a runtime w/o aot-debug can reject an aot module w/ aot-debug gracefully.
• alignment info here and there. cf. https://github.com/bytecodealliance/wasm-micro-runtime/pull/3017