build: Add ${RING_INCLUDE_DIR} to set the daemon header path

Refs #72463

(cherry picked from commit 9cc633e5)

cmake/FindRing.cmake

@@ -6,6 +6,8 @@ SET(RING_FOUND true)
 
 IF(EXISTS ${CMAKE_INSTALL_PREFIX}/include/dring/dring.h)
    SET(ring_INCLUDE_DIRS ${CMAKE_INSTALL_PREFIX}/include/dring)
+ELSEIF(EXISTS ${RING_INCLUDE_DIR}/dring.h)
+   SET(ring_INCLUDE_DIRS ${RING_INCLUDE_DIR})
 ELSEIF(EXISTS ${RING_BUILD_DIR}/dring/dring.h)
    SET(ring_INCLUDE_DIRS ${RING_BUILD_DIR}/dring)
 ELSE()