Improved DFP documentation, logging and fix MonitorStage

[dagardner-nv]

Description

Monitor Stage Changes

• Only build a C++ node for MonitorStage if the message type is supported on the C++ side.
• Ensure the MonitorStage is omitted from the pipeline if silenced by the configured log level (this optimization existed for the Python node, this change just applies it to the C++ node).

DFP Changes

• Update the version of Morpheus used by the DFP Docker containers, and add it to the ci/release/update-version.sh script.
• Set the default log level for DFP pipelines to INFO
• Document fetching the DFP datasets from within the docker container. This allows for an all-docker workflow, and avoids the need for users to create a Conda environment on their host system just to download the example data.
• Document that the DFP pipelines can be run from either the CLI or from a Jupyter Notebook.
• Update fetch_example_data.py to print output if the dataset has already been fetched.

Closes #2105
Closes #2100
Closes #2101

By Submitting this PR I confirm:

• I am familiar with the Contributing Guidelines.
• When the PR is ready for review, new or existing tests cover these changes.
• When the PR is ready for review, the documentation is up to date with these changes.

[dagardner-nv]

/merge