Add find_dependency calls for remaining deps

Now we also resolve `OpenTracing`, and `prometheus-cpp`.

If necessary, `CURL` and `ZLIB` are also resolved.

Author: tobim

cmake/opentelemetry-cpp-config.cmake.in

@@ -82,10 +82,28 @@ if(@WITH_OTLP_GRPC@)
   find_dependency(gRPC)
 endif()
 
+if("@OpenTracing_FOUND@")
+  find_dependency(OpenTracing)
+endif()
+
+if("@prometheus-cpp_FOUND@")
+  find_dependency(prometheus-cpp)
+endif()
+
 if("@Protobuf_FOUND@" OR "@PROTOBUF_FOUND@")
   find_dependency(Protobuf)
 endif()
 
+if (@WITH_HTTP_CLIENT_CURL@ AND NOT @BUILD_SHARED_LIBS@)
+  if("@CURL_FOUND@")
+    find_dependency(CURL)
+  endif()
+
+  if("@ZLIB_FOUND@")
+    find_dependency(ZLIB)
+  endif()
+endif()
+
 set_and_check(OPENTELEMETRY_CPP_INCLUDE_DIRS "@PACKAGE_INCLUDE_INSTALL_DIR@")
 set_and_check(OPENTELEMETRY_CPP_LIBRARY_DIRS "@PACKAGE_CMAKE_INSTALL_LIBDIR@")