Auto merge of #118861 - Veykril:r-a-in-tree, r=onur-ozkan

Set the `in-rust-tree` feature for all rust-analyzer{-proc-macro-srv} steps

Some context: This came up in https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer/topic/libraryfying.20match.20checking.3F where `test` and `check` behaved differently for rust-analyzer
r? `@onur-ozkan`

Author: bors