Audit use of assert! and debug_assert! for bloat

[brson]

assert! can cause an unexpected amount of code bloat that takes time to compile and fills up binary space to never ever be executed. See what its impact is on tikv.

A good way to start would be to simply convert all asserts to debug_asserts and benchmark, see if it's worth pursuing. Consider doing the same with tikv's raft and prometheus dependencies.

If it seems worth pursing then decide on a case-by-case basis which have the biggest impact and can be converted.

https://github.com/dtolnay/cargo-expand can probably help.

[brson]

I don't think this is worth doing.