[Diagnostics] Use contains instead of has when non-Sendable type appears inside of a member type

(cherry picked from commit 3495c61)

Author: xedin

include/swift/AST/DiagnosticsSema.def

@@ -5869,8 +5869,8 @@ ERROR(non_sendable_keypath_capture,none,
       (Type))
 ERROR(non_concurrent_type_member,none,
       "%select{stored property %2|associated value %2}1 of "
-      "'Sendable'-conforming %kind3 has non-Sendable type %0",
-      (Type, bool, DeclName, const ValueDecl *))
+      "'Sendable'-conforming %kind3 %select{contains|has}4 non-Sendable type %0",
+      (Type, bool, DeclName, const ValueDecl *, bool))
 ERROR(concurrent_value_class_mutable_property,none,
       "stored property %0 of 'Sendable'-conforming %kind1 is mutable",
       (DeclName, const ValueDecl *))

lib/Sema/TypeCheckConcurrency.cpp

@@ -6832,7 +6832,7 @@ static bool checkSendableInstanceStorage(
             member
                 ->diagnose(diag::non_concurrent_type_member, type,
                            isa<EnumElementDecl>(member), member->getName(),
-                           nominal)
+                           nominal, type->isEqual(memberType))
                 .limitBehaviorWithPreconcurrency(
                     behavior, fromPreconcurrencyConformance ||
                                   preconcurrencyBehavior.has_value());

test/Concurrency/concurrent_value_checking.swift

@@ -339,7 +339,7 @@ enum E2<T> {
 extension E2: Sendable where T: Sendable { }
 
 final class C1: Sendable {
-  let nc: NotConcurrent? = nil // expected-warning{{stored property 'nc' of 'Sendable'-conforming class 'C1' has non-Sendable type 'NotConcurrent'}}
+  let nc: NotConcurrent? = nil // expected-warning{{stored property 'nc' of 'Sendable'-conforming class 'C1' contains non-Sendable type 'NotConcurrent'}}
   var x: Int = 0 // expected-warning{{stored property 'x' of 'Sendable'-conforming class 'C1' is mutable}}
   let i: Int = 0
 }

test/Concurrency/sendable_metatype_typecheck.swift

@@ -119,11 +119,11 @@ class Holder: @unchecked Sendable {
 }
 
 enum E: Sendable {
-case q(Q.Type, Int) // expected-warning{{associated value 'q' of 'Sendable'-conforming enum 'E' has non-Sendable type 'any Q.Type'}}
+case q(Q.Type, Int) // expected-warning{{associated value 'q' of 'Sendable'-conforming enum 'E' contains non-Sendable type 'any Q.Type'}}
 }
 
 struct S: Sendable {
-  var tuple: ([Q.Type], Int) // expected-warning{{stored property 'tuple' of 'Sendable'-conforming struct 'S' has non-Sendable type 'any Q.Type'}}
+  var tuple: ([Q.Type], Int) // expected-warning{{stored property 'tuple' of 'Sendable'-conforming struct 'S' contains non-Sendable type 'any Q.Type'}}
 }
 
 extension Q {