Add suport for workspace data sources, and ITSM connections in particular, for 'az monitor log-analytics solutions' cli extension

Currently there is no automation (SDK/REST/ps/ARM...) available to list the solution data sources.

Our current use-case is to retrieve the ITSM connection-id, so we can add as an ITSM-receiver in monitor action groups.

We presently have no choice but to click-ops through the portal and manually copy-paste into our code-base, so the ARM template to create the action group and receivers has the right details.

The "show" verb in the "az monitor log-analytics solution" extension does not show this in the present output.

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#### Document Details

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* ID: 85800f89-0ca6-57a4-e473-e38fddbf83e7
* Version Independent ID: 0b37d225-24d0-701c-279d-7027089a30dc
* Content: [az monitor log-analytics solution](https://docs.microsoft.com/en-us/cli/azure/monitor/log-analytics/solution?view=azure-cli-latest#az_monitor_log_analytics_solution_list)
* Content Source: [latest/docs-ref-autogen/monitor/log-analytics/solution.yml](https://github.com/MicrosoftDocs/azure-docs-cli/blob/master/latest/docs-ref-autogen/monitor/log-analytics/solution.yml)
* Service: **monitoring-and-diagnostics**
* GitHub Login: @rloutlaw
* Microsoft Alias: **routlaw**