Separate monitoring core and visualization dependencies (#2911)

This reflects a difference in code maturity and maintenance between the
two: monitoring core is much more maintained and stable than visualization
at the moment.

Work with LSST has repeatedly encountered dependency problems caused by
the visualization dependencies, even though those dependencies are not need
by LSST, and this separation allows the visualization dependencies to be
skipped.

Breaking change:
If you are using visualization you will now need to:

  pip install parsl[monitoring,visualization]

to get all of the dependencies previously installed by [monitoring]

Makefile

@@ -74,7 +74,7 @@ wqex_local_test: $(CCTOOLS_INSTALL)  ## run all tests with workqueue_ex config
 
 .PHONY: config_local_test
 config_local_test:
-	pip3 install ".[monitoring,proxystore]"
+	pip3 install ".[monitoring,visualization,proxystore]"
 	pytest parsl/tests/ -k "not cleannet" --config local --random-order --durations 10
 
 .PHONY: site_test

docs/userguide/monitoring.rst

@@ -56,7 +56,7 @@ Visualization
 To run the web dashboard utility ``parsl-visualize`` you first need to install
 its dependencies:
 
-   $ pip install 'parsl[monitoring]'
+   $ pip install 'parsl[monitoring,visualization]'
 
 To view the web dashboard while or after a Parsl program has executed, run
 the ``parsl-visualize`` utility::

setup.py

@@ -8,7 +8,9 @@
 
 extras_require = {
     'monitoring' : [
-        'sqlalchemy>=1.4,<2',
+        'sqlalchemy>=1.4,<2'
+    ],
+    'visualization' : [
         'pydot',
         'networkx>=2.5,<2.6',
         'Flask>=1.0.2',