Auto merge of #12182 - Muscraft:sort-unstable-z-flags, r=epage

chore: Lexicographically order `-Z` flags

When looking at [`unstable_cli_options!`](https://github.com/rust-lang/cargo/blob/6ec9649372a3d03958d15e96bdbf078ee50a2a71/src/cargo/core/features.rs#L693), I noticed a comment about keeping the list ["lexicographically ordered"](https://github.com/rust-lang/cargo/blob/6ec9649372a3d03958d15e96bdbf078ee50a2a71/src/cargo/core/features.rs#L699), and saw that it wasn't ordered correctly.

This PR orders the list of unstable features within [`unstable_cli_options!`](https://github.com/rust-lang/cargo/blob/6ec9649372a3d03958d15e96bdbf078ee50a2a71/src/cargo/core/features.rs#L693) lexicographically.

To review this PR, it would probably be easiest to read the list [from my branch](https://github.com/Muscraft/cargo/blob/765e8867893f1083152a67a1c447408e3458c90e/src/cargo/core/features.rs#L693).

src/cargo/core/features.rs

@@ -696,42 +696,42 @@ unstable_cli_options!(
     print_im_a_teapot: bool = (HIDDEN),
 
     // All other unstable features.
-    // Please keep this list lexiographically ordered.
+    // Please keep this list lexicographically ordered.
     advanced_env: bool = (HIDDEN),
     avoid_dev_deps: bool = ("Avoid installing dev-dependencies if possible"),
     binary_dep_depinfo: bool = ("Track changes to dependency artifacts"),
     bindeps: bool = ("Allow Cargo packages to depend on bin, cdylib, and staticlib crates, and use the artifacts built by those crates"),
     #[serde(deserialize_with = "deserialize_build_std")]
     build_std: Option<Vec<String>>  = ("Enable Cargo to compile the standard library itself as part of a crate graph compilation"),
     build_std_features: Option<Vec<String>>  = ("Configure features enabled for the standard library itself when building the standard library"),
+    #[serde(deserialize_with = "deserialize_check_cfg")]
+    check_cfg: Option<(/*features:*/ bool, /*well_known_names:*/ bool, /*well_known_values:*/ bool, /*output:*/ bool)> = ("Specify scope of compile-time checking of `cfg` names/values"),
     codegen_backend: bool = ("Enable the `codegen-backend` option in profiles in .cargo/config.toml file"),
     config_include: bool = ("Enable the `include` key in config files"),
     credential_process: bool = ("Add a config setting to fetch registry authentication tokens by calling an external process"),
-    #[serde(deserialize_with = "deserialize_check_cfg")]
-    check_cfg: Option<(/*features:*/ bool, /*well_known_names:*/ bool, /*well_known_values:*/ bool, /*output:*/ bool)> = ("Specify scope of compile-time checking of `cfg` names/values"),
+    direct_minimal_versions: bool = ("Resolve minimal dependency versions instead of maximum (direct dependencies only)"),
     doctest_in_workspace: bool = ("Compile doctests with paths relative to the workspace root"),
     doctest_xcompile: bool = ("Compile and run doctests for non-host target using runner config"),
     dual_proc_macros: bool = ("Build proc-macros for both the host and the target"),
     features: Option<Vec<String>>  = (HIDDEN),
     gitoxide: Option<GitoxideFeatures> = ("Use gitoxide for the given git interactions, or all of them if no argument is given"),
+    host_config: bool = ("Enable the [host] section in the .cargo/config.toml file"),
     jobserver_per_rustc: bool = (HIDDEN),
+    lints: bool = ("Pass `[lints]` to the linting tools"),
     minimal_versions: bool = ("Resolve minimal dependency versions instead of maximum"),
-    direct_minimal_versions: bool = ("Resolve minimal dependency versions instead of maximum (direct dependencies only)"),
+    msrv_policy: bool = ("Enable rust-version aware policy within cargo"),
     mtime_on_use: bool = ("Configure Cargo to update the mtime of used files"),
     no_index_update: bool = ("Do not update the registry index even if the cache is outdated"),
     panic_abort_tests: bool = ("Enable support to run tests with -Cpanic=abort"),
     profile_rustflags: bool = ("Enable the `rustflags` option in profiles in .cargo/config.toml file"),
-    host_config: bool = ("Enable the [host] section in the .cargo/config.toml file"),
+    publish_timeout: bool = ("Enable the `publish.timeout` key in .cargo/config.toml file"),
     registry_auth: bool = ("Authentication for alternative registries, and generate registry authentication tokens using asymmetric cryptography"),
-    target_applies_to_host: bool = ("Enable the `target-applies-to-host` key in the .cargo/config.toml file"),
     rustdoc_map: bool = ("Allow passing external documentation mappings to rustdoc"),
+    rustdoc_scrape_examples: bool = ("Allows Rustdoc to scrape code examples from reverse-dependencies"),
     separate_nightlies: bool = (HIDDEN),
-    publish_timeout: bool = ("Enable the `publish.timeout` key in .cargo/config.toml file"),
-    unstable_options: bool = ("Allow the usage of unstable options"),
     skip_rustdoc_fingerprint: bool = (HIDDEN),
-    rustdoc_scrape_examples: bool = ("Allows Rustdoc to scrape code examples from reverse-dependencies"),
-    msrv_policy: bool = ("Enable rust-version aware policy within cargo"),
-    lints: bool = ("Pass `[lints]` to the linting tools"),
+    target_applies_to_host: bool = ("Enable the `target-applies-to-host` key in the .cargo/config.toml file"),
+    unstable_options: bool = ("Allow the usage of unstable options"),
 );
 
 const STABILIZED_COMPILE_PROGRESS: &str = "The progress bar is now always \