[swss] Depend on Python 3 version of swsscommon rather than Python 2 (#…

…6432)

The only Python code in the SwSS package, restore_neighbors.py, was recently converted to Python 3 and most dependencies were updated as part of #6207. However, the SwSS makefile still listed the Python 2 version of the swsscommon package as a dependency. This caused Python 2-related packages to be installed in containers unnecessarily.

rules/swss.mk

@@ -8,7 +8,7 @@ $(SWSS)_DEPENDS += $(LIBSAIREDIS_DEV) $(LIBSAIMETADATA_DEV) $(LIBTEAM_DEV) \
 $(SWSS)_UNINSTALLS = $(LIBSAIVS_DEV)
 
 $(SWSS)_RDEPENDS += $(LIBSAIREDIS) $(LIBSAIMETADATA) $(LIBTEAM) \
-    $(LIBTEAMDCTL) $(LIBSWSSCOMMON) $(PYTHON_SWSSCOMMON)
+    $(LIBTEAMDCTL) $(LIBSWSSCOMMON) $(PYTHON3_SWSSCOMMON)
 SONIC_DPKG_DEBS += $(SWSS)
 
 SWSS_DBG = swss-dbg_1.0.0_$(CONFIGURED_ARCH).deb