Make msteams use common recipient with filled data field

[EdwardDowling]

Change msteams to using the provided data field in the common recipient type to store extra required data.

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[hugoShaka]

Can we remove

teleport/integrations/access/common/recipient.go

Lines 153 to 160 in c9d3ce3

	// GetNames returns a slice of the recipient names in the set.
	func (s *RecipientSet) GetNames() []string {
	names := make([]string, 0, len(s.recipients))
	for _, recipient := range s.recipients {
	names = append(names, recipient.Name)
	}
	return names
	}

as well?