Add pytest-xdist and pytest-profiling to the base installation packag…

…es. (apache#6736)

For building and testing some small portions of the python testsuite,
I've been playing off and on with xdist and pytest-profiling.

We know it's not safe for the entirity of CI yet but this could
enable smaller parts of pipelines that folks use using the
common scripts to be parallelized or indeed profiled for more
insight into where time is spent in building and testing TVM

docker/install/ubuntu_install_python_package.sh

@@ -21,4 +21,4 @@ set -u
 set -o pipefail
 
 # install libraries for python package on ubuntu
-pip3 install six numpy pytest cython decorator scipy tornado typed_ast pytest mypy orderedset attrs requests Pillow packaging cloudpickle
+pip3 install six numpy pytest cython decorator scipy tornado typed_ast pytest pytest-xdist pytest-profiling mypy orderedset attrs requests Pillow packaging cloudpickle