[opencv4] no absolute paths (#28203)

ports/opencv4/portfile.cmake

@@ -577,7 +577,7 @@ endif()
 
 vcpkg_fixup_pkgconfig()
 
-configure_file("${CURRENT_PORT_DIR}/usage.in" "${CURRENT_PACKAGES_DIR}/share/${PORT}/usage")
+configure_file("${CURRENT_PORT_DIR}/usage.in" "${CURRENT_PACKAGES_DIR}/share/${PORT}/usage" @ONLY)
 
 file(GLOB extra_license_files "${CURRENT_PACKAGES_DIR}/share/licenses/opencv4/*")
 vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE" ${extra_license_files})

ports/opencv4/usage.in

@@ -1,5 +1,5 @@
-If you do not install the meta-port *opencv*, the package ${PORT} is compatible with CMake
+If you do not install the meta-port *opencv*, the package @PORT@ is compatible with CMake
 if you set the OpenCV_DIR *before* the find_package call
 
-    set(OpenCV_DIR "${CURRENT_INSTALLED_DIR}/share/${PORT}")
+    set(OpenCV_DIR "${VCPKG_INSTALLED_DIR}/@TARGET_TRIPLET@/share/@PORT@")
     find_package(OpenCV REQUIRED)

ports/opencv4/vcpkg.json

@@ -1,7 +1,7 @@
 {
   "name": "opencv4",
   "version": "4.6.0",
-  "port-version": 9,
+  "port-version": 10,
   "description": "computer vision library",
   "homepage": "https://github.com/opencv/opencv",
   "license": "Apache-2.0",

versions/baseline.json

@@ -5482,7 +5482,7 @@
     },
     "opencv4": {
       "baseline": "4.6.0",
-      "port-version": 9
+      "port-version": 10
     },
     "opendnp3": {
       "baseline": "3.1.1",

versions/o-/opencv4.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "4ddfc66a3d38c96fbe831242cdd1148d54cbca87",
+      "version": "4.6.0",
+      "port-version": 10
+    },
     {
       "git-tree": "3fcb51fbbc3605e41bcdbd0ea0acd6233127b49b",
       "version": "4.6.0",