Update new Span-related tests to enable Span experimental feature

Author: DougGregor

test/Macros/PointerBounds/CountedBy/MutableSpan.swift

@@ -1,7 +1,9 @@
 // REQUIRES: swift_swift_parser
 // REQUIRES: pointer_bounds
-// XFAIL: OS=windows-msvc
-// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions 2>&1 | %FileCheck --match-full-lines %s
+// REQUIRES: swift_feature_Span
+
+// RUN: not %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions -enable-experimental-feature Span > %t.log 2>&1
+// RUN: %FileCheck --match-full-lines %s < %t.log
 
 @PointerBounds(.countedBy(pointer: 1, count: "len"), .nonescaping(pointer: 1))
 func myFunc(_ ptr: UnsafeMutablePointer<CInt>, _ len: CInt) {

test/Macros/PointerBounds/CountedBy/SimpleSpan.swift

@@ -1,7 +1,8 @@
 // REQUIRES: swift_swift_parser
 // REQUIRES: pointer_bounds
+// REQUIRES: swift_feature_Span
 
-// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions 2>&1 | %FileCheck --match-full-lines %s
+// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions -enable-experimental-feature Span 2>&1 | %FileCheck --match-full-lines %s
 
 @PointerBounds(.countedBy(pointer: 1, count: "len"), .nonescaping(pointer: 1))
 func myFunc(_ ptr: UnsafePointer<CInt>, _ len: CInt) {

test/Macros/PointerBounds/CountedBy/SimpleSpanWithReturn.swift

@@ -1,7 +1,8 @@
 // REQUIRES: swift_swift_parser
 // REQUIRES: pointer_bounds
+// REQUIRES: swift_feature_Span
 
-// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions 2>&1 | %FileCheck --match-full-lines %s
+// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions -enable-experimental-feature Span 2>&1 | %FileCheck --match-full-lines %s
 
 @PointerBounds(.countedBy(pointer: 1, count: "len"), .nonescaping(pointer: 1))
 func myFunc(_ ptr: UnsafePointer<CInt>, _ len: CInt) -> CInt {

test/Macros/PointerBounds/SizedBy/MutableRawSpan.swift

@@ -1,7 +1,9 @@
 // REQUIRES: swift_swift_parser
 // REQUIRES: pointer_bounds
-// XFAIL: OS=windows-msvc
-// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions 2>&1 | %FileCheck --match-full-lines %s
+// REQUIRES: swift_feature_Span
+
+// RUN: not %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions -enable-experimental-feature Span > %t.log 2>&1
+// RUN: %FileCheck --match-full-lines %s < %t.log
 
 @PointerBounds(.sizedBy(pointer: 1, size: "size"), .nonescaping(pointer: 1))
 func myFunc(_ ptr: UnsafeMutableRawPointer, _ size: CInt) {

test/Macros/PointerBounds/SizedBy/SimpleRawSpan.swift

@@ -1,7 +1,8 @@
 // REQUIRES: swift_swift_parser
 // REQUIRES: pointer_bounds
+// REQUIRES: swift_feature_Span
 
-// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions 2>&1 | %FileCheck --match-full-lines %s
+// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions -enable-experimental-feature Span 2>&1 | %FileCheck --match-full-lines %s
 
 @PointerBounds(.sizedBy(pointer: 1, size: "size"), .nonescaping(pointer: 1))
 func myFunc(_ ptr: UnsafeRawPointer, _ size: CInt) {

test/Macros/PointerBounds/SizedBy/SimpleRawSpanWithReturn.swift

@@ -1,7 +1,8 @@
 // REQUIRES: swift_swift_parser
 // REQUIRES: pointer_bounds
+// REQUIRES: swift_feature_Span
 
-// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions 2>&1 | %FileCheck --match-full-lines %s
+// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -plugin-path %swift-plugin-dir -dump-macro-expansions -enable-experimental-feature Span 2>&1 | %FileCheck --match-full-lines %s
 
 @PointerBounds(.sizedBy(pointer: 1, size: "size"), .nonescaping(pointer: 1))
 func myFunc(_ ptr: UnsafeRawPointer, _ size: CInt) -> CInt {