Rename TypeManager to Manager.

With the move to the type:: hierarchy rename type::TypeManager to
type::Manager.

Bug: tint:1718
Change-Id: I1c8e2c2e469e20b959676232e9f3d62c9b3a789e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/113429
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>

src/tint/program_builder.h

diff --git a/src/tint/program_builder.h b/src/tint/program_builder.h
index feacc38..a2ca5b43 100644
--- a/src/tint/program_builder.h
+++ b/src/tint/program_builder.h
@@ -299,13 +299,13 @@
     ProgramID ID() const { return id_; }
 
     /// @returns a reference to the program's types
-    type::TypeManager& Types() {
+    type::Manager& Types() {
         AssertNotMoved();
         return types_;
     }
 
     /// @returns a reference to the program's types
-    const type::TypeManager& Types() const {
+    const type::Manager& Types() const {
         AssertNotMoved();
         return types_;
     }
@@ -3247,7 +3247,7 @@
   private:
     ProgramID id_;
     ast::NodeID last_ast_node_id_ = ast::NodeID{static_cast<decltype(ast::NodeID::value)>(0) - 1};
-    type::TypeManager types_;
+    type::Manager types_;
     ASTNodeAllocator ast_nodes_;
     SemNodeAllocator sem_nodes_;
     ConstantAllocator constant_nodes_;