Bump redis to 4.5.5

[vrigal]

It was necessary to bump mozci to release the redis major constraint.

[vrigal]

Some dependencies are missing building dependencies with the new mozci requirement (> 2.0) using pip-compile:

• zstandard (defined in mozci pyproject.toml though)
• boto3 optional dependency

The application cannot start yet because of those missing deps.

[jmaher]

2023-06-21 10:02:55.287 | WARNING | mozci.configuration:init:149 - Configuration path /home/.config/mozci/config.toml is not a file.
______________ ERROR collecting tests/push_health/test_compare.py ______________
ImportError while importing test module '/app/tests/push_health/test_compare.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/local/lib/python3.9/importlib/init.py:127: in import_module
return _bootstrap._gcd_import(name[level:], package, level)
tests/push_health/test_compare.py:6: in
from treeherder.push_health.compare import get_commit_history
treeherder/push_health/compare.py:2: in
from mozci.push import Push as MozciPush
/usr/local/lib/python3.9/site-packages/mozci/init.py:2: in
from mozci.configuration import config # noqa
/usr/local/lib/python3.9/site-packages/mozci/configuration.py:226: in
config = Configuration()
/usr/local/lib/python3.9/site-packages/mozci/configuration.py:154: in init
self.cache = CustomCacheManager(self._config["cache"])
/usr/local/lib/python3.9/site-packages/mozci/configuration.py:96: in init
self.register_serializer("compressedpickle", CompressedPickleSerializer())
/usr/local/lib/python3.9/site-packages/mozci/util/cache_stores.py:238: in init
import zstandard
E ModuleNotFoundError: No module named 'zstandard'

[vrigal]

Closed in favor of #7730