Rollup merge of #125575 - dingxiangfei2009:derive-smart-ptr, r=davidtwco

SmartPointer derive-macro

<!--
If this PR is related to an unstable feature or an otherwise tracked effort,
please link to the relevant tracking issue here. If you don't know of a related
tracking issue or there are none, feel free to ignore this.

This PR will get automatically assigned to a reviewer. In case you would like
a specific user to review your work, you can assign it to them by using

    r​? <reviewer name>
-->

Possibly replacing #123472 for continued upkeep of the proposal rust-lang/rfcs#3621 and implementation of the tracking issue #123430.

cc `@Darksonn` `@wedsonaf`

compiler/rustc_span/src/symbol.rs

@@ -174,6 +174,7 @@ symbols! {
         Center,
         Cleanup,
         Clone,
+        CoerceUnsized,
         Command,
         ConstParamTy,
         Context,
@@ -189,6 +190,7 @@ symbols! {
         DiagMessage,
         Diagnostic,
         DirBuilder,
+        DispatchFromDyn,
         Display,
         DoubleEndedIterator,
         Duration,
@@ -299,8 +301,10 @@ symbols! {
         Saturating,
         Send,
         SeqCst,
+        Sized,
         SliceIndex,
         SliceIter,
+        SmartPointer,
         Some,
         SpanCtxt,
         String,
@@ -323,6 +327,7 @@ symbols! {
         TyCtxt,
         TyKind,
         Unknown,
+        Unsize,
         Upvars,
         Vec,
         VecDeque,
@@ -707,6 +712,7 @@ symbols! {
         derive,
         derive_const,
         derive_default_enum,
+        derive_smart_pointer,
         destruct,
         destructuring_assignment,
         diagnostic,
@@ -1315,6 +1321,7 @@ symbols! {
         on,
         on_unimplemented,
         opaque,
+        ops,
         opt_out_copy,
         optimize,
         optimize_attribute,
@@ -1389,6 +1396,7 @@ symbols! {
         plugin,
         plugin_registrar,
         plugins,
+        pointee,
         pointee_trait,
         pointer,
         pointer_like,