Rollup merge of #49196 - Phlosioneer:49123-sort-where-conditions, r=QuietMisdreavus

Fix ordering of auto-generated trait bounds in rustdoc output

While the order of the where clauses was deterministic, the
ordering of bounds and lifetimes was not. This made the order flip-
flop randomly when new traits and impls were added to libstd.

This PR makes the ordering of bounds and lifetimes deterministic,
and re-enables the test that was causing the issue.

Fixes #49123

src/test/rustdoc/synthetic_auto/no-redundancy.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-test
-
 pub struct Inner<T> {
     field: T,
 }