Merge pull request #62296 from apple/egorzhdan/cxxstdlib-step2

[cxx-interop] Replace `std` module name with the new spelling `CxxStdlib`

Author: egorzhdan

SwiftCompilerSources/Sources/Basic/Utils.swift

@@ -11,7 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 @_exported import BasicBridging
-import std
+import CxxStdlib
 
 /// The assert function to be used in the compiler.
 ///

test/Interop/Cxx/stdlib/overlay/std-string-overlay.swift

@@ -4,7 +4,7 @@
 // REQUIRES: OS=macosx || OS=linux-gnu
 
 import StdlibUnittest
-import std
+import CxxStdlib
 
 var StdStringOverlayTestSuite = TestSuite("std::string overlay")
 

test/Interop/Cxx/stdlib/use-std-map.swift

@@ -10,7 +10,7 @@
 
 import StdlibUnittest
 import StdMap
-import std
+import CxxStdlib
 import Cxx
 
 var StdMapTestSuite = TestSuite("StdMap")

test/Interop/Cxx/stdlib/use-std-vector.swift

@@ -7,7 +7,7 @@
 
 import StdlibUnittest
 import StdVector
-import std.vector
+import CxxStdlib.vector
 
 var StdVectorTestSuite = TestSuite("StdVector")