[cmake] Only add wpilibj to generated config if Java is enabled (wpilibsuite#8434)

Fixes wpilibsuite#8422

Author: rzblue

CMakeLists.txt

@@ -351,7 +351,9 @@ endif()
 if(WITH_WPILIB)
     set(APRILTAG_DEP_REPLACE "find_dependency(apriltag)")
     set(WPILIBC_DEP_REPLACE "find_dependency(wpilibc)")
-    set(WPILIBJ_DEP_REPLACE "find_dependency(wpilibj)")
+    if(WITH_JAVA)
+        set(WPILIBJ_DEP_REPLACE "find_dependency(wpilibj)")
+    endif()
     set(WPILIBNEWCOMMANDS_DEP_REPLACE "find_dependency(wpilibNewCommands)")
     add_subdirectory(apriltag)
     add_subdirectory(wpilibj)