[stdlib] changes to lifetime annotations

Changes to lifetime annotations implemented in swiftlang#80064

Author: glessard

stdlib/public/core/Span/RawSpan.swift

@@ -310,7 +310,7 @@ extension RawSpan {
   ///   - span: An existing `Span<T>`, which will define both this
   ///           `RawSpan`'s lifetime and the memory it represents.
   @_alwaysEmitIntoClient
-  @lifetime(span)
+  @lifetime(copy span)
   public init<Element: BitwiseCopyable>(
     _elements span: Span<Element>
   ) {

stdlib/public/core/Span/Span.swift

@@ -498,7 +498,7 @@ extension Span where Element: BitwiseCopyable {
 extension Span where Element: BitwiseCopyable {
 
   public var bytes: RawSpan {
-    @lifetime(self)
+    @lifetime(copy self)
     @_alwaysEmitIntoClient
     get {
       let rawSpan = RawSpan(_elements: self)