Add DesugaringKind::FormatLiteral

Implements `DesugaringKind::FormatLiteral` to mark the FormatArgs desugaring of format literals. The main use for this is to stop yapping about about formatting parameters if we're not anywhere near a format literal. The other use case is to fix suggestions such as rust-lang#141350. It might also be useful for new or existing diagnostics that check whether they're in a format-like macro.

cc `@xizheyin` `@fmease`

Rollup of 10 pull requests

Successful merges:

 - #140254 (Pass -Cpanic=abort for the panic_abort crate)
 - #142594 (Add DesugaringKind::FormatLiteral)
 - #142600 (Port `#[rustc_pub_transparent]` to the new attribute system)
 - #142617 (improve search graph docs, reset `encountered_overflow` between reruns)
 - #142641 (Generate symbols.o for proc-macros too)
 - #142747 (rustdoc_json: conversion cleanups)
 - #142776 (All HIR attributes are outer)
 - #142800 (integer docs: remove extraneous text)
 - #142850 (remove asm_goto feature annotation, for it is now stabilized)
 - #142860 (Notify me on tidy changes)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup of 10 pull requests

Successful merges:

 - #142458 (Merge unboxed trait object error suggestion into regular dyn incompat error)
 - #142593 (Add a warning to LateContext::get_def_path)
 - #142594 (Add DesugaringKind::FormatLiteral)
 - #142740 (Clean-up `FnCtxt::is_destruct_assignment_desugaring`)
 - #142780 (Port `#[must_use]` to new attribute parsing infrastructure)
 - #142798 (Don't fail to parse a struct if a semicolon is used to separate fields)
 - #142856 (Add a few inline directives in rustc_serialize.)
 - #142868 (remove few allow(dead_code))
 - #142874 (cranelift: fix target feature name typo: "fxsr")
 - #142877 (Document why tidy checks if `eslint` is installed via `npm`)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of #142594 - mejrs:new_desugaring, r=chenyukang

Add DesugaringKind::FormatLiteral

Implements `DesugaringKind::FormatLiteral` to mark the FormatArgs desugaring of format literals. The main use for this is to stop yapping about about formatting parameters if we're not anywhere near a format literal. The other use case is to fix suggestions such as #141350. It might also be useful for new or existing diagnostics that check whether they're in a format-like macro.

cc `@xizheyin` `@fmease`

Add DesugaringKind::FormatLiteral

Implements `DesugaringKind::FormatLiteral` to mark the FormatArgs desugaring of format literals. The main use for this is to stop yapping about about formatting parameters if we're not anywhere near a format literal. The other use case is to fix suggestions such as rust-lang#141350. It might also be useful for new or existing diagnostics that check whether they're in a format-like macro.

cc `@xizheyin` `@fmease`