[stdlib] Collection types are eagerMove.

Types that have "value semantics" should not have lexical lifetimes.
Value types are not expected to have custom deinits. Are not expected to
expose unsafe interior pointers. And cannot have weak references because
they are structs. Therefore, deinitialization barriers are irrelevant.

rdar://107076869

Author: nate-chandler

stdlib/public/core/Array.swift

@@ -297,6 +297,7 @@
 ///   instances of those types always have a contiguous block of memory as
 ///   their storage.
 @frozen
+@_eagerMove
 public struct Array<Element>: _DestructorSafeContainer {
   #if _runtime(_ObjC)
   @usableFromInline

stdlib/public/core/ContiguousArray.swift

@@ -34,6 +34,7 @@
 /// For more information about using arrays, see `Array` and `ArraySlice`, with
 /// which `ContiguousArray` shares most properties and methods.
 @frozen
+@_eagerMove
 public struct ContiguousArray<Element>: _DestructorSafeContainer {
   @usableFromInline
   internal typealias _Buffer = _ContiguousArrayBuffer<Element>

stdlib/public/core/Dictionary.swift

@@ -386,6 +386,7 @@
 /// optimization that is used when two instances of `Dictionary` share
 /// buffer.
 @frozen
+@_eagerMove
 public struct Dictionary<Key: Hashable, Value> {
   /// The element type of a dictionary: a tuple containing an individual
   /// key-value pair.

stdlib/public/core/Set.swift

@@ -144,6 +144,7 @@
 /// same copy-on-write optimization that is used when two instances of `Set`
 /// share buffer.
 @frozen
+@_eagerMove
 public struct Set<Element: Hashable> {
   @usableFromInline
   internal var _variant: _Variant

stdlib/public/core/String.swift

@@ -349,6 +349,7 @@ internal func unimplemented_utf8_32bit(
 /// [scalars]: http://www.unicode.org/glossary/#unicode_scalar_value
 /// [equivalence]: http://www.unicode.org/glossary/#canonical_equivalent
 @frozen
+@_eagerMove
 public struct String {
   public // @SPI(Foundation)
   var _guts: _StringGuts