Adding software-client and tsconfig to PIP_PACKAGES to have their
dependencies fulfilled on stx-platformclients image
Test Plan:
PASS Build python3 wheels tarball on Debian and build
stx-platformclients image on Debian.
Depends-On: https://review.opendev.org/c/starlingx/update/+/901240
Story: 2010676
Task: 49164
Change-Id: I84c951405c4caa3f4a7846979b59ff23cca54d23
Signed-off-by: Guilherme Costa <guilherme.costa@windriver.com>