Add in upgrade step for upgrading Event date and Relationship Active Date smart groups

[seamuslee001]

Overview

This handles the upgrade process for smart groups following the jcalendar to datepicker conversion in #15661

Before

Smart Groups not converted

After

Smart Groups converted

Technical Details

Unlike many other forms you can create smart groups in find participant search which stores it in format of => rather than in [, , ] format

Comments

ping @eileenmcnaughton

[civibot]

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[eileenmcnaughton]

Thanks for getting your head around that @seamuslee001 - the tests look good & we had existing test cover on the other patterns so if you can sell jenkins on it I'm good with i

[seamuslee001]

@eileenmcnaughton i have included the relationship active date upgrade in this now and confirmed locally that it works