Audit `#[expect(clippy::large_enum_variant)]` usage in bevy_render

A new clippy lint was recently added, and it is failing CI. I am making a PR to expect all the failures and link to this tracking issue to unblock CI immediately, to make actual auditing and discussion of each case less urgent.

A cursory glance reveals that a lot of these are actually things we want to fix, not just overzealous linting, but I think benchmarking is the only way to know for sure, and that takes time.

Relevant lint: https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant