Cranelift: Use bump allocation in remove_constant_phis pass (#4710)

* Cranelift: Use bump allocation in `remove_constant_phis` pass

This makes compilation 2-6% faster for Sightglass's bz2 benchmark:

```
compilation :: cycles :: benchmarks/bz2/benchmark.wasm

  Δ = 7290648.36 ± 4245152.07 (confidence = 99%)

  bump.so is 1.02x to 1.06x faster than main.so!

  [166388177 183238542.98 214732518] bump.so
  [172836648 190529191.34 217514271] main.so

compilation :: cycles :: benchmarks/pulldown-cmark/benchmark.wasm

  No difference in performance.

  [182220055 225793551.12 277857575] bump.so
  [193212613 227784078.61 277175335] main.so

compilation :: cycles :: benchmarks/spidermonkey/benchmark.wasm

  No difference in performance.

  [3848442474 4295214144.37 4665127241] bump.so
  [3969505457 4262415290.10 4563869974] main.so
```

* Add audit for `bumpalo`

* Add an audit of `arrayvec` version 0.7.2

* Remove unnecessary `collect` into `Vec`

I wasn't able to measure any perf difference here, but its nice to do anyways.

* Use a `SecondaryMap` for keeping track of summaries

cranelift/codegen/Cargo.toml

@@ -13,6 +13,8 @@ build = "build.rs"
 edition = "2021"
 
 [dependencies]
+arrayvec = "0.7"
+bumpalo = "3"
 cranelift-codegen-shared = { path = "./shared", version = "0.88.0" }
 cranelift-entity = { path = "../entity", version = "0.88.0" }
 cranelift-bforest = { path = "../bforest", version = "0.88.0" }