[macos] add XCode 15 to MacOS 13 images (#7693)

Author: ilia-shipitsin

images/macos/toolsets/toolset-13.json

@@ -3,6 +3,7 @@
         "default": "14.2",
         "x64": {
             "versions": [
+                { "link": "15.0", "version": "15.0.0" },
                 { "link": "14.3.1", "version": "14.3.1" },
                 { "link": "14.3", "version": "14.3.0" },
                 { "link": "14.2", "version": "14.2.0" },
@@ -11,6 +12,7 @@
         },
         "arm64":{
             "versions": [
+                { "link": "15.0", "version": "15.0.0" },
                 { "link": "14.3.1", "version": "14.3.1" },
                 { "link": "14.3", "version": "14.3.0" },
                 { "link": "14.2", "version": "14.2.0" },