Auto merge of #109507 - Amanieu:panic-oom-payload, r=davidtwco

Report allocation errors as panics

OOM is now reported as a panic but with a custom payload type (`AllocErrorPanicPayload`) which holds the layout that was passed to `handle_alloc_error`.

This should be review one commit at a time:
- The first commit adds `AllocErrorPanicPayload` and changes allocation errors to always be reported as panics.
- The second commit removes `#[alloc_error_handler]` and the `alloc_error_hook` API.

ACP: rust-lang/libs-team#192

Closes #51540
Closes #51245

Author: bors

compiler/rustc_builtin_macros/messages.ftl

@@ -4,8 +4,6 @@ builtin_macros_requires_cfg_pattern =
 
 builtin_macros_expected_one_cfg_pattern = expected 1 cfg-pattern
 
-builtin_macros_alloc_error_must_be_fn = alloc_error_handler must be a function
-
 builtin_macros_assert_requires_boolean = macro requires a boolean expression as an argument
     .label = boolean expression required