Platform: add some version indicators on C++ submodules

Specify the C++ standard required for these submodules.  Although this
has no practical implications, it is useful for isolating the features
with different C++ standards.

Author: compnerd

stdlib/public/Platform/vcruntime.modulemap

@@ -237,6 +237,7 @@ module std [system] {
     }
 
     module cuchar {
+      requires cplusplus11
       header "cuchar"
       export *
     }
@@ -258,26 +259,31 @@ module std [system] {
   }
 
   module any {
+    requires cpluplus17
     header "any"
     export *
   }
 
   module array {
+    requires cplusplus11
     header "array"
     export *
   }
 
   module atomic {
+    requires cplusplus11
     header "atomic"
     export *
   }
 
   module barrier {
+    requires cplusplus20
     header "barrier"
     export *
   }
 
   module bit {
+    requires cplusplus20
     header "bit"
     export *
   }
@@ -288,11 +294,13 @@ module std [system] {
   }
 
   module charconv {
+    requires cplusplus17
     header "charconv"
     export *
   }
 
   module chrono {
+    requires cplusplus11
     header "chrono"
     export *
   }
@@ -303,6 +311,7 @@ module std [system] {
   }
 
   module compare {
+    requires cplusplus20
     header "compare"
     export *
   }
@@ -313,16 +322,19 @@ module std [system] {
   }
 
   module concepts {
+    requires cplusplus20
     header "concepts"
     export *
   }
 
   module condition_variable {
+    requires cplusplus11
     header "condition_variable"
     export *
   }
 
   module coroutine {
+    requires cplusplus20
     header "coroutine"
     export *
   }
@@ -338,21 +350,25 @@ module std [system] {
   }
 
   module execution {
+    requires cplusplus17
     header "execution"
     export *
   }
 
   module filesystem {
+    requires cplusplus17
     header "filesystem"
     export *
   }
 
   module format {
+    requires cplusplus20
     header "format"
     export *
   }
 
   module forward_list {
+    requires cplusplus11
     header "forward_list"
     export *
   }
@@ -368,6 +384,7 @@ module std [system] {
   }
 
   module future {
+    requires cplusplus11
     header "future"
     export *
   }
@@ -387,6 +404,7 @@ module std [system] {
 */
 
   module initializer_list {
+    requires cplusplus11
     header "initializer_list"
     export *
   }
@@ -417,6 +435,7 @@ module std [system] {
   }
 
   module latch {
+    requires cplusplus20
     header "latch"
     export *
   }
@@ -447,11 +466,13 @@ module std [system] {
   }
 
   module memory_resource {
+    requires cplusplus17
     header "memory_resource"
     export *
   }
 
   module mutex {
+    requires cplusplus11
     header "mutex"
     export *
   }
@@ -462,6 +483,7 @@ module std [system] {
   }
 
   module numbers {
+    requires cplusplus20
     header "numbers"
     export *
   }
@@ -472,6 +494,7 @@ module std [system] {
   }
 
   module optional {
+    requires cplusplus17
     header "optional"
     export *
   }
@@ -487,31 +510,37 @@ module std [system] {
   }
 
   module random {
+    requires cplusplus11
     header "random"
     export *
   }
 
   module ranges {
+    requires cplusplus20
     header "ranges"
     export *
   }
 
   module ratio {
+    requires cplusplus11
     header "ratio"
     export *
   }
 
   module regex {
+    requires cplusplus11
     header "regex"
     export *
   }
 
   module scoped_allocator {
+    requires cplusplus11
     header "scoped_allocator"
     export *
   }
 
   module semaphore {
+    requires cplusplus20
     header "semaphore"
     export *
   }
@@ -522,22 +551,26 @@ module std [system] {
   }
 
   module shared_mutex {
+    requires cplusplus14
     header "shared_mutex"
     export *
   }
 
   module source_location {
+    requires cplusplus20
     header "source_location"
     export *
   }
 
   module span {
+    requires cplusplus20
     header "span"
     export *
   }
 
 /*
   module spanstream {
+    requires cpluplus23
     header "spanstream"
     export *
   }
@@ -559,6 +592,7 @@ module std [system] {
   }
 
   module stop_token {
+    requires cplusplus20
     header "stop_token"
     export *
   }
@@ -574,6 +608,7 @@ module std [system] {
   }
 
   module string_view {
+    requires cplusplus17
     header "string_view"
     export *
   }
@@ -584,31 +619,37 @@ module std [system] {
   }
 
   module syncstream {
+    requires cplusplus20
     header "syncstream"
     export *
   }
 
   module system_error {
+    requires cplusplus11
     header "system_error"
     export *
   }
 
   module thread {
+    requires cplusplus11
     header "thread"
     export *
   }
 
   module tuple {
+    requires cplusplus11
     header "tuple"
     export *
   }
 
   module type_traits {
+    requires cplusplus11
     header "type_traits"
     export *
   }
 
   module typeindex {
+    requires cplusplus11
     header "typeindex"
     export *
   }
@@ -619,11 +660,13 @@ module std [system] {
   }
 
   module unordered_map {
+    requires cplusplus11
     header "unordered_map"
     export *
   }
 
   module unordered_set {
+    requires unordered_set
     header "unordered_set"
     export *
   }
@@ -639,6 +682,7 @@ module std [system] {
   }
 
   module variant {
+    requires cplusplus17
     header "variant"
     export *
   }
@@ -649,6 +693,7 @@ module std [system] {
   }
 
   module version {
+    requires cplusplus20
     header "version"
     export *
   }