Australian payroll now uses the shared payroll period calculation method instead of a separate custom list. This keeps pay period handling more consistent and easier to maintain, with no expected change for day-to-day users.

After this commit, instead of using a dictionary, we will use a standard method to get the factors of a pay period in `l10n_au_hr_payroll`.

task-4029012

Marketing automation campaign activity cards now display the percentage of messages opened instead of the bounced percentage. This gives marketers a more useful engagement metric directly in the campaign view, helping them assess campaign performance at a glance.

This commit removes the bounced percentage from activity kanban card in the mareting_automation's campaign form view and adds the opened percentage.

Task-4125818