date: use jiff-icu for locale calendar conversions (#10499)

* date: use jiff-icu for locale calendar conversions

* fuzz: update Cargo.lock for jiff-icu

* fix: add cfg(unix) to check_date, format Cargo.toml files

Author: sylvestre

Cargo.lock

@@ -346,6 +346,7 @@ indicatif = "0.18.0"
 itertools = "0.14.0"
 itoa = "1.0.15"
 jiff = "0.2.18"
+jiff-icu = "0.2.2"
 libc = "0.2.172"
 lscolors = { version = "0.21.0", default-features = false, features = [
   "gnu_legacy",