Fix Badge to use token processor

Badge appears to be the only place in core that renders participant tokens - so to switch over we need

• Unit test covering badge
• Add participant token processor
• switch badge over
• as part of this as a follow up ... event tokens

Note that there are other places that would like to leverage participant tokens - I'm leaving that stuff to be part of the task to fix up the pdf letter. There is also the email letter - which probably needs it's own gitlab

added 1 deleted label

added improvement triaged labels

mentioned in commit f7aed6e3

mentioned in commit 6bc70c3c

marked the checklist item Unit test covering badge as completed

marked the checklist item Add participant token processor as completed

marked the checklist item switch badge over as completed

mentioned in commit 873bfeb5

mentioned in commit 1c340655

marked the checklist item as part of this as a follow up ... event tokens as completed

changed milestone to %5.43.0

Badges are rendering tokens through the token processor now. Note that for the event fields the tokens are being 'offered up' with Day month formatting appended - eg. October 27nd for historical consistency. they wind up like

    '{event.start_date|crmDate:"%B %E%f"}' => ts('Event Start Date'),
    '{event.end_date|crmDate:"%B %E%f"}' => ts('Event End Date'),

closed