Update events calendar components for compatibility with change for LibCal de-dupe

[cappadona]

I want to change the text of the field label so it's clearer to staff/admin:

From

Will this be advertised through Cornell Events?

To

ATTN STAFF: Suppress from events calendar (DE-DUPE)?

But the current string is hardcoded into the events calendar Vue components and changing the label in LibCal on its own results in locking up the browser...so this will require a coordinated effort.