Transform lifetimes in ignored fields when deriving SystemParam

[2ne1ugly]

Objective

• Fixes Invalid lifetime when deriving SystemParam #7447

Solution

• Transform lifetimes in ignored fields of the struct ('w -> '_w, 's -> '_s for get_param function macro derive)

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Changelog

• Add transform_lifetimes_in_type and its family
• Use underscore prefix instead of w2, s2 in get_param quote (a bit like type Item above)
• Add regression test

TODO

• Consider expanding Type::Verbatim and Type::Macro (if it's possible?)
• Benchmark compile time
• Check if the code style fits correctly along with other codes
• Fix my broken rustfmt
• Add docs

[alice-i-cecile]

I think we should go with #7458 instead: the problem appears to be quite simple.

[2ne1ugly]

I think we should go with #7458 instead: the problem appears to be quite simple.

I see, closing this pr