VOL-4977 Failure in voltha-protos verification job.

Makefile
makefiles/consts.mk
makefiles/virtualenv.mk
-----------------------
  o Update to use library makefile virtualenv.mk to create .venv
    and remove by clean/sterile target.
  o Construct commands using '&&' -vs- ';' to better detect errors.
  o pip install packages relocated into the requirements.txt file.
  o Separate extra deps from target rule since they are never
    processed by the target rule.
  o Added banners for readabilty.

makefiles/lint/golang/sca.mk
makefiles/lint/golang/include.mk
--------------------------------
  o lint target for golang sources.

Tested with python v3.10 (localhost) and v2.7 (docker container).
Debug to see if hangs are dependent on the patch reported in vol-4977.

Change-Id: I0783f6fb347bf2cd15350f9e17fc19695343b7ac
7 files changed