Help: Update Sphinx versionadded directives for 3.19 release

Run the script:

    Utilities/Sphinx/update_versions.py --since v3.18.0 --overwrite

Help/policy/CMP0110.rst

@@ -1,6 +1,8 @@
 CMP0110
 -------
 
+.. versionadded:: 3.19
+
 :command:`add_test` supports arbitrary characters in test names.
 
 :command:`add_test` can now (officially) create tests with whitespace and

Help/prop_tgt/OPTIMIZE_DEPENDENCIES.rst

@@ -1,6 +1,8 @@
 OPTIMIZE_DEPENDENCIES
 ---------------------
 
+.. versionadded:: 3.19
+
 Activates dependency optimization of static and object libraries.
 
 When this property is set to true, some dependencies for a static or object

Help/prop_tgt/XCODE_LINK_BUILD_PHASE_MODE.rst

@@ -1,6 +1,8 @@
 XCODE_LINK_BUILD_PHASE_MODE
 ---------------------------
 
+.. versionadded:: 3.19
+
 When using the :generator:`Xcode` generator, libraries to be linked will be
 specified in the Xcode project file using either the "Link Binary With
 Libraries" build phase or directly as linker flags.  The former allows Xcode

Help/variable/CMAKE_OPTIMIZE_DEPENDENCIES.rst

@@ -1,4 +1,6 @@
 CMAKE_OPTIMIZE_DEPENDENCIES
 ---------------------------
 
+.. versionadded:: 3.19
+
 Initializes the :prop_tgt:`OPTIMIZE_DEPENDENCIES` target property.

Help/variable/CMAKE_XCODE_BUILD_SYSTEM.rst

@@ -1,6 +1,8 @@
 CMAKE_XCODE_BUILD_SYSTEM
 ------------------------
 
+.. versionadded:: 3.19
+
 Xcode build system selection.
 
 The :generator:`Xcode` generator defines this variable to indicate which

Help/variable/CMAKE_XCODE_LINK_BUILD_PHASE_MODE.rst

@@ -1,6 +1,8 @@
 CMAKE_XCODE_LINK_BUILD_PHASE_MODE
 ---------------------------------
 
+.. versionadded:: 3.19
+
 This variable is used to initialize the
 :prop_tgt:`XCODE_LINK_BUILD_PHASE_MODE` property on targets.
 It affects the methods that the :generator:`Xcode` generator uses to link