python3: merge python3-email into python3-urllib

As we're seeing in various test.sh scrip runs, importing 'email' fails
with not finding 'urllib' and vice-versa.

Then via a7e96ec91 ("python3-email: add python3-urllib as dependency")
I created a circular dependency.
So, might as well merge the two packages into one (named python3-urllib)
and updates all dependencies to pull python3-urllib.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

lang/python/python-packaging/Makefile

@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=python-packaging
 PKG_VERSION:=26.0
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PYPI_NAME:=packaging
 PKG_HASH:=00243ae351a257117b6a241061796684b084ed1c516a08c48a3f7e147a9d80b4
@@ -32,7 +32,7 @@ define Package/python3-packaging
   SUBMENU:=Python
   TITLE:=Core utilities for Python packages
   URL:=https://github.com/pypa/packaging
-  DEPENDS:=+python3-light +python3-email +python3-logging
+  DEPENDS:=+python3-light +python3-urllib +python3-logging
 endef
 
 define Package/python3-packaging/description