Change docs command suggestions to follow style convention

[AhdraMeraliQB]

Description

As part of #2014 it was discovered that we are not consistent in how we format cli commands with flags. It was decided that we should be using kedro command --flag=value1,value2 and kedro command --flag='value with spaces 1, value with spaces 2'.

This will affect:
https://kedro.readthedocs.io/en/stable/development/commands_reference.html#modifying-a-kedro-run
https://kedro.readthedocs.io/en/stable/data/data_catalog.html#version-datasets-and-ml-models
https://kedro.readthedocs.io/en/stable/kedro_project_setup/configuration.html#specify-parameters-at-runtime
https://kedro.readthedocs.io/en/stable/get_started/new_project.html#create-a-new-project-from-a-configuration-file
https://kedro.readthedocs.io/en/stable/visualisation/kedro-viz_visualisation.html
https://kedro.readthedocs.io/en/stable/nodes_and_pipelines/run_a_pipeline.html#run-a-pipeline-by-name
https://kedro.readthedocs.io/en/stable/nodes_and_pipelines/slice_a_pipeline.html
https://kedro.readthedocs.io/en/stable/kedro_project_setup/configuration.html#configure-kedro-run-arguments
https://kedro.readthedocs.io/en/stable/deployment/dask.html

(This list may be incomplete)

Note: https://kedro.readthedocs.io/en/stable/development/commands_reference.html#modifying-a-kedro-run has a list of flags to modify kedro run. This list is missing --conf-source, --to-outputs, and --async. These should be added in (with the same formatting convention).

[stichbury]

This all seems very reasonable to me @AhdraMeraliQB and I'd be happy to see these pages changed (ideally not to change them myself though, unless I'm supervised to ensure nothing is broken in the fix).

Some of these pages definitely need revision anyway (the configuration page is a key page) but it's probably best to do this task in one, and then go back to the pages and make improvements separately.

Feel free to put this into an upcoming sprint and I'll happily review.

[AhdraMeraliQB]

Note: --conf-source was already added to the documentation in #2187 and is available on the latest build of the docs