[TVMScript] Print Executor, Runtime, and FunctionInfo as metadata

[Lunderberg]

Instances of relay::Executor, relay::Runtime, and relay::backend::FunctionInfo may be inserted into a PrimFunc's attributes for bookkeeping purposes. In these flows, the function should still be able to be printed for debugging purposes.

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• cc @Hzfengsy, @junrushao, @shingjan _{See #10317 for details}

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[junrushao]

Not sure if we wanted to print anything for Relay under printer/ir/ folder, because we are not maintaining Relay any more. However, I don't object if we printed it out if it helps with some usecases in production

[Lunderberg]

That makes sense, and agreed that it doesn't make sense to pull in portions that aren't maintained. This mainly arose while debugging some CI failures in #14778, where these types being used as attributes caused some debug print statements to fail.

Maybe it would be better to have a fallback catch-all that prints the type? That way, we avoid the relay dependency, but can still print the portions that are maintained.