Reduce memory usage of rate limiting (#3111)

Reduce memory usage of rate limiting (#3111)

* Reduce Vec allocations

* Optimize stuff

* Move embedded migrations to separate crate

* Revert "Move embedded migrations to separate crate"

This reverts commit 44b104997016ee2a1f2c0bb735b75e654666860d.

* clippy, fmt

* Shrink rate limit allowance to f32

* Initialize rate limit allowance directly

* Add removal of old rate limit buckets

* Improve readability

* Remove usage of is_okay_and for Rust 1.67 compatibility

* Add dhat-heap feature

* Fix api_benchmark.sh and add run_and_benchmark.sh

* Revert "Fix api_benchmark.sh and add run_and_benchmark.sh"

This reverts commit b4528e5b85dd3f13cea43d72ada9382200c8fc77.

* Revert "Add dhat-heap feature"

This reverts commit 08e835d487b983c44ce2570d8c396d570d426916.

* Manually revert remaining stuff

* Use Ipv6Addr in RateLimitStorage

* Shrink last_checked in RateLimitBucket to 32 bits

* Fix rate_limit::get_ip

* Stuff (#1)

* Update rate_limiter.rs

* Update mod.rs

* Update scheduled_tasks.rs

* Fix rate_limiter.rs

* Dullbananas patch 1 (#2)

* Update rate_limiter.rs

* Update mod.rs

* Update scheduled_tasks.rs

* Fix rate_limiter.rs

* Rate limit IPv6 addresses in groups

* Fmt lib.rs

* woodpicker trigger

* Refactor and comment `check_rate_limit_full`

* Add `test_split_ipv6`

* Replace -2.0 with UNINITIALIZED_TOKEN_AMOUNT

* Add `test_rate_limiter`

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Co-authored-by: Dessalines <dessalines@users.noreply.github.com>