fix(dashboards): Change widget legend series name delimiter

[nikkikapadia]

Two things (kind of related)

• Originally the series name delimiter was : however apparently there are series names that have : in the name 🤩 so the widget legend was not working. I changed it to ;. Also set this as a constant in the code so changing it requires a couple of line changes instead of searching through the file.
• Also just realized the tooltip was showing the modified timeseries name that we use to control the legend hence I put a name formatter for the tooltip to account for that

Sidenote: if there's any other bugs you notice let me know. Planning to EA on Monday

[codecov]

Codecov Report

Attention: Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
static/app/views/dashboards/widgetCard/chart.tsx	50.00%	2 Missing ⚠️
...pp/views/dashboards/widgetLegendSelectionState.tsx	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #79760      +/-   ##
==========================================
+ Coverage   73.30%   78.44%   +5.13%     
==========================================
  Files        7143     7143              
  Lines      315972   315983      +11     
  Branches    43487    43493       +6     
==========================================
+ Hits       231635   247875   +16240     
+ Misses      77862    61774   -16088     
+ Partials     6475     6334     -141     

[narsaynorath]

Not entirely sure if this line is related to your change or not, but does the ':' also have to get replaced with your delimiter here?

Also, are we using , in any special way? I saw something about a series list delimiter. If you group by multiple values those groupings (e.g. group by organization_slug and project) and you get a legend item like org_slug,project iirc.

[nikkikapadia]

this : is not related to the change, that has to do with other legend names :)

also , is fine because we're encoding all the series names before using that delimiter so it doesn't get messed up.