[Windows] Add Java 21 (#8534)

Author: vpolikarpov-akvelon

images/win/toolsets/toolset-2019.json

@@ -144,7 +144,7 @@
     ],
     "java": {
         "default": "8",
-        "versions": [ "8", "11", "17" ]
+        "versions": [ "8", "11", "17", "21"]
     },
     "android": {
         "commandline_tools_url": "https://dl.google.com/android/repository/commandlinetools-win-9123335_latest.zip",

images/win/toolsets/toolset-2022.json

@@ -128,7 +128,7 @@
     ],
     "java": {
         "default": "8",
-        "versions": [ "8", "11", "17" ]
+        "versions": [ "8", "11", "17", "21"]
     },
     "android": {
         "commandline_tools_url": "https://dl.google.com/android/repository/commandlinetools-win-9123335_latest.zip",