fix(ci): pin py-cpuinfo to 8.0.0 (backport #4375) (#4379)

Our profiler and benchmark test suites currently use pytest-benchmark, which internally relies on a plugin import to `py-cpuinfo`, which has released a major version 9.x dropping support for Python <= 3.6. This has broken our profiler and benchmark test suites, so I've pinned those test suites to use `py-cpuinfo==8.0.0` which was the latest released version which still supports Python<=3.6.


Co-authored-by: Yun Kim <35776586+Yun-Kim@users.noreply.github.com>
Co-authored-by: Yun Kim <yun.kim@datadoghq.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Munir Abdinur <munir.abdinur@datadoghq.com>

riotfile.py

@@ -194,7 +194,10 @@ def select_pys(min_version=MIN_PYTHON_VERSION, max_version=MAX_PYTHON_VERSION):
         Venv(
             pys=select_pys(),
             pkgs={
+                # pytest-benchmark depends on cpuinfo which dropped support for Python<=3.6 in 9.0
+                # See https://github.com/workhorsy/py-cpuinfo/issues/177
                 "pytest-benchmark": latest,
+                "py-cpuinfo": "~=8.0.0",
                 "msgpack": latest,
                 # TODO: remove py dependency once https://github.com/ionelmc/pytest-benchmark/pull/227 is released
                 "py": latest,

tox.ini

@@ -115,6 +115,9 @@ deps =
     py{27,35,36,37,38,39}-profile: uwsgi
     # TODO: remove py dependency once https://github.com/ionelmc/pytest-benchmark/pull/227 is released
     profile: py
+    # pytest-benchmark depends on cpuinfo which dropped support for Python<=3.6 in 9.0
+    # See https://github.com/workhorsy/py-cpuinfo/issues/177
+    profile: py-cpuinfo==8.0.0
     py{27,35,36,37,38,39}-profile-minreqs: protobuf==3.0.0
     py310-profile-minreqs: protobuf==3.8.0
     profile-minreqs: tenacity==5.0.1