mqtt: Fix sending log data; dup flag after queue

* Fix sending mqtt message longer than Tx buffer size
* Fix enqueue API to send data with correct dup flag
* Update submodule: git log --oneline b86d42c..985078a

Detailed description of the changes:
* Isolate IDF env for v4.4 and v5.0(master)
  - See merge request espressif/esp-mqtt!111
  - ci: Isolate IDF env for v4.4 and v5.0(master) (espressif/esp-mqtt@4c5a65c)
* Client: Remove usage of legacy FreeRTOS types
  - See merge request espressif/esp-mqtt!120
  - ci: Fix build issues with IDF-4.4 against master (espressif/esp-mqtt@c28a56d)
  - See commit espressif@6ef98d6
* mqtt_client: Fix mqtt send long data error
  - See merge request espressif/esp-mqtt!117
  - Closes espressif#214
  - See commit espressif@372b323
* Client: Fix use esp_mqtt_client_enqueue API to send data, data dup flag will be set 1
  - See merge request espressif/esp-mqtt!116
  - See commit espressif@df8dc92