Remove use of overrideDefaultCurrency method from eventInfo page.

[braders]

Overview

Updates the civicrm/event/info route to show the current currency in multi-currencies setups.

Before

As discussed in https://lab.civicrm.org/dev/core/-/issues/2930#note_66911, CRM_Contribute_BAO_Contribution_Utils::overrideDefaultCurrency does not work correctly with the new money functions recently introduced in 386fe6c and d6d93aa.

Whilst there is a good argument for updating CRM_Contribute_BAO_Contribution_Utils::overrideDefaultCurrency to work with the new functions for backwards compatiability, I think moving away from overriding the default currency is a cleaner long-term solution.

After

The overrideDefaultCurrency method is no longer used on the eventInfo page, and the correct currency is used, even if the event and default currencies are different.

The getTaxLabel method has been updated to accept a new optional currency argument, in order to facilitate this change.

Comments

I've kept this PR minimal to start, and so have just focussed on this single eventInfo page - other pages can be handled through follow up PRs.

[civibot]

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[mattwire]

Hi @braders the overrideDefaultCurrency causes various problems. Good to see it being phased out!