[build] Fix build issue in docker-ptf-sai caused by setuptools_scm ne…

…w release (sonic-net#16636) (sonic-net#16680)

Why I did it
When SUPERVISOR_PROC_EXIT_LISTENER_SCRIPT changed, almost all dockers need to be built again.
But currently it will be loaded by cache.

Work item tracking
Microsoft ADO (number only): 25123348
How I did it
Add $(DOCKER)_FILES into dependencies.

How to verify it

dockers/docker-ptf-sai/Dockerfile.j2

@@ -21,6 +21,9 @@ RUN pip3 install crc16          \
         importlib-metadata      \
         xmlrunner
 
+# 8.0.1 breaks build on 09/20/2023
+RUN pip3 install setuptools_scm==7.1.0
+
 COPY \
 {% for deb in docker_ptf_sai_debs.split(' ') -%}
 debs/{{ deb }}{{' '}}