Allow to disable specialized tokenizations (again)

In PR #2773, I added the `chinese`, `hebrew`, `japanese` and `thai`
feature flags to allow melisearch to be built without huge specialed
tokenizations that took up 90% of the melisearch binary size.
Unfortunately, due to some recent changes, this doesn't work anymore.
The problem lies in excessive use of the `default` feature flag, which
infects the dependency graph.

Instead of adding `default-features = false` here and there, it's easier
and more future-proof to not declare `default` in `milli` and
`meilisearch-types`. I've renamed it to `all-tokenizers`, which also
makes it a bit clearer what it's about.

benchmarks/Cargo.toml

@@ -13,7 +13,7 @@ license.workspace = true
 [dependencies]
 anyhow = "1.0.70"
 csv = "1.2.1"
-milli = { path = "../milli", default-features = false }
+milli = { path = "../milli" }
 mimalloc = { version = "0.1.36", default-features = false }
 serde_json = { version = "1.0.95", features = ["preserve_order"] }
 
@@ -31,7 +31,7 @@ flate2 = "1.0.25"
 reqwest = { version = "0.11.16", features = ["blocking", "rustls-tls"], default-features = false }
 
 [features]
-default = ["milli/default"]
+default = ["milli/all-tokenizations"]
 
 [[bench]]
 name = "search_songs"