Rollup merge of #122935 - RalfJung:with-exposed-provenance, r=Amanieu

rename ptr::from_exposed_addr -> ptr::with_exposed_provenance

As discussed on [Zulip](427757066).

The old name, `from_exposed_addr`, makes little sense as it's not the address that is exposed, it's the provenance. (`ptr.expose_addr()` stays unchanged as we haven't found a better option yet. The intended interpretation is "expose the provenance and return the address".)

The new name nicely matches `ptr::without_provenance`.

compiler/rustc_span/src/symbol.rs

@@ -1675,7 +1675,6 @@ symbols! {
         simd_fmin,
         simd_fpow,
         simd_fpowi,
-        simd_from_exposed_addr,
         simd_fsin,
         simd_fsqrt,
         simd_gather,
@@ -1714,6 +1713,7 @@ symbols! {
         simd_shuffle_generic,
         simd_sub,
         simd_trunc,
+        simd_with_exposed_provenance,
         simd_xor,
         since,
         sinf128,