Auto merge of #114489 - compiler-errors:rpitit-capture-all, r=oli-obk

Make RPITITs capture all in-scope lifetimes

Much like #114616, this implements the lang team decision from this T-lang meeting on [opaque captures strategy moving forward](https://hackmd.io/sFaSIMJOQcuwCdnUvCxtuQ?view). This will be RFC'd soon, but given that RPITITs are a nightly feature, this shouldn't necessarily be blocked on that.

We unconditionally capture all lifetimes in RPITITs -- impl is not as simple as #114616, since we still need to duplicate RPIT lifetimes to make sure we reify any late-bound lifetimes in scope.

Closes #112194

compiler/rustc_span/src/symbol.rs

@@ -1366,6 +1366,7 @@ symbols! {
         rustc_trivial_field_reads,
         rustc_unsafe_specialization_marker,
         rustc_variance,
+        rustc_variance_of_opaques,
         rustdoc,
         rustdoc_internals,
         rustdoc_missing_doc_code_examples,