Auto merge of #101318 - GuillaumeGomez:rollup-qsr51z4, r=GuillaumeGomez

Auto merge of #101318 - GuillaumeGomez:rollup-qsr51z4, r=GuillaumeGomez

Rollup of 9 pull requests

Successful merges:

 - #97739 (Uplift the `let_underscore` lints from clippy into rustc.)
 - #99583 (Add additional methods to the Demand type)
 - #100147 (optimization of access level table construction)
 - #100552 (rustc_target: Add a compatibility layer to separate internal and user-facing linker flavors)
 - #100827 (Simplify MIR opt tests)
 - #101166 (Generate error index with mdbook instead of raw HTML pages)
 - #101294 (Fix #100844 rebase accident)
 - #101298 (rustdoc: remove unused CSS `#main-content > .since`)
 - #101304 (Add autolabels for `A-query-system`)

Failed merges:

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