Added Usage tab link loading for statistics link

[t-scholtz]

Added capability so that when you load a chart link from the usage tab ie https://xdmod.access-ci.org/index.php#tg_usage?node=statistic_Jobs_nodecount_utilization the usage tab will load that chart, instead of loading the default chart configuration

Note - this does not handle the case for group charts ie https://xdmod.access-ci.org/index.php#tg_usage?node=group_by_Jobs_nodecount which are handled like the old case and just load the default chart instead.

Motivation and Context

This allows users to share usage tab charts, as well as adds the production effort in creating an XDMod Chatbot

[aestoltm]

Left a suggestions for a minor refactor when we know what dimension the url is referring to. There are also a few changes to some of the variable names so they are more consistent with the XDMoD language. I also included a small change so that this can work with the 'Summary Overview' charts. Even though we most likely will not support those charts with the chat bot I think it would be nice to support in the portal.

Please let me know if you have any questions on the suggested changes.

Stale review

[aestoltm]

The regex is throwing a sonar warning. Need to confirm if it needs to be adjusted.