Auto merge of #103042 - davidtwco:translation-distributed-ftl, r=oli-obk

errors: generate typed identifiers in each crate

Instead of loading the Fluent resources for every crate in `rustc_error_messages`, each crate generates typed identifiers for its own diagnostics and creates a static which are pulled together in the `rustc_driver` crate and provided to the diagnostic emitter.

There are advantages and disadvantages to this change..

#### Advantages
- Changing a diagnostic now only recompiles the crate for that diagnostic and those crates that depend on it, rather than `rustc_error_messages` and all crates thereafter.
- This approach can be used to support first-party crates that want to supply translatable diagnostics (e.g. `rust-lang/thorin` in #102612 (comment), cc `@JhonnyBillM)`
- We can extend this a little so that tools built using rustc internals (like clippy or rustdoc) can add their own diagnostic resources (much more easily than those resources needing to be available to `rustc_error_messages`)

#### Disadvantages
- Crates can only refer to the diagnostic messages defined in the current crate (or those from dependencies), rather than all diagnostic messages.
- `rustc_driver` (or some other crate we create for this purpose) has to directly depend on *everything* that has error messages.
  - It already transitively depended on all these crates.

#### Pending work
- [x] I don't know how to make `rustc_codegen_gcc`'s translated diagnostics work with this approach - because `rustc_driver` can't depend on that crate and so can't get its resources to provide to the diagnostic emission. I don't really know how the alternative codegen backends are actually wired up to the compiler at all.
- [x] Update `triagebot.toml` to track the moved FTL files.

r? `@compiler-errors`
cc #100717

Author: bors

Cargo.lock

@@ -3930,26 +3930,47 @@ version = "0.0.0"
 dependencies = [
  "libc",
  "rustc_ast",
+ "rustc_ast_lowering",
+ "rustc_ast_passes",
  "rustc_ast_pretty",
+ "rustc_attr",
+ "rustc_borrowck",
+ "rustc_builtin_macros",
  "rustc_codegen_ssa",
+ "rustc_const_eval",
  "rustc_data_structures",
  "rustc_error_codes",
+ "rustc_error_messages",
  "rustc_errors",
+ "rustc_expand",
  "rustc_feature",
  "rustc_hir",
  "rustc_hir_analysis",
  "rustc_hir_pretty",
+ "rustc_hir_typeck",
+ "rustc_incremental",
+ "rustc_infer",
  "rustc_interface",
  "rustc_lint",
  "rustc_log",
  "rustc_macros",
  "rustc_metadata",
  "rustc_middle",
+ "rustc_mir_build",
+ "rustc_mir_dataflow",
+ "rustc_monomorphize",
  "rustc_parse",
+ "rustc_passes",
  "rustc_plugin_impl",
+ "rustc_privacy",
+ "rustc_query_system",
+ "rustc_resolve",
  "rustc_session",
  "rustc_span",
+ "rustc_symbol_mangling",
  "rustc_target",
+ "rustc_trait_selection",
+ "rustc_ty_utils",
  "serde_json",
  "tracing",
  "winapi",