Bug 1821243 - Update to jsonschema 4.17.3 r=ahochheiden

We are using features from modern JSONSchema drafts, like dependantRequired, in
the Firefox Messaging System schemas. jsonschema 3.x does not support these
features. Experimenter is also being updated to 4.17.3 and we want to keep our
validation tests in sync with Experimenter.

Differential Revision: https://phabricator.services.mozilla.com/D172457

python/sites/docs.txt

@@ -11,9 +11,7 @@ pypi:fluent.pygments==1.0
 pypi:fluent.syntax==0.18.1
 pypi:idna==2.10
 pypi:imagesize==1.2.0
-pypi:importlib-resources==3.0.0
 pypi:jmespath==0.10.0
-pypi:jsonschema==3.2.0
 pypi:livereload==2.6.3
 pypi:Markdown==3.3.4
 pypi:MarkupSafe==2.0.1
@@ -51,11 +49,14 @@ pypi:sphinxcontrib-mermaid==0.8.1
 pypi:sphinxcontrib-qthelp==1.0.3
 pypi:sphinxcontrib-serializinghtml==1.1.5
 pypi:tornado==6.0.4
+vendored:third_party/python/Jinja2
 vendored:third_party/python/certifi
 vendored:third_party/python/chardet
 vendored:third_party/python/importlib_metadata
-vendored:third_party/python/Jinja2
+vendored:third_party/python/importlib_resources
+vendored:third_party/python/jsonschema
 vendored:third_party/python/packaging
+vendored:third_party/python/pkgutil_resolve_name
 vendored:third_party/python/requests
 vendored:third_party/python/rsa
 vendored:third_party/python/sentry_sdk

python/sites/mach.txt

@@ -80,6 +80,7 @@ vendored:third_party/python/giturlparse
 vendored:third_party/python/gyp/pylib
 vendored:third_party/python/idna
 vendored:third_party/python/importlib_metadata
+vendored:third_party/python/importlib_resources
 vendored:third_party/python/Jinja2
 vendored:third_party/python/jinxed
 vendored:third_party/python/jsmin
@@ -95,6 +96,7 @@ vendored:third_party/python/packaging
 vendored:third_party/python/pathspec
 vendored:third_party/python/pip
 vendored:third_party/python/pip_tools
+vendored:third_party/python/pkgutil_resolve_name
 vendored:third_party/python/ply
 vendored:third_party/python/pyasn1
 vendored:third_party/python/pyasn1_modules