We unconditionally set this to avoid recompiling tools between
`x check $tool` and `x test $tool` executions.

See rust-lang#116538 for more information.

Signed-off-by: onur-ozkan <[email protected]>

This was made possible by the removal of plugin support, which
simplified lint store creation.

This simplifies the places in rustc and rustdoc that call
`describe_lints`, which are early on. The lint store is now built before
those places, so they don't have to create their own lint store for
temporary use, they can just use the main one.

Lint registration now happens early enough that we can run it from
`Config`, before `Compiler` is created.

Move `lint_store`

Some nice cleanups enabled by the removal of compiler plugins.

r? `@cjgillot`

…lacrum

bootstrap: simplify setting unstable-options for tools

Previously, we unconditionally(instead of `if path == "src/tools/clippy" || ..`) set this (to prevent recompiling tools between `x check $tool` and '` check $another_tool` executions) specifically for tools in the `x check` step. This PR relocates that logic to `fn prepare_tool_cargo`, making it step-agnostic.

Fixes rust-lang#116538
Fixes rust-lang#117983

docs(release): Clarify cargo entries

Trying to make these easier to scan and more understandable out of the context of their PR

…-Simulacrum

avoid exhaustive i16 test in Miri

rust-lang#116301 added a test that is way too slow to be running in Miri. So let's only test a few hopefully representative cases.

…compiler-errors

`rustc_query_system` cleanups

Minor cleanups.

r? `@compiler-errors`