Upgrade task to handle %A date format specifier change

[demeritcowboy]

Overview

See #24032 (comment)

Alternative to #24070

As @seamuslee001 noted there is some difficulty in accurately detecting use of %A with date_format (as opposed to crmDate) where it's ok and correct to use %A, and in fact the event receipt template currently does use it. But I think I've got it pretty close.

Before

After

If it detects you are using %A in a message template it might look something this:

Otherwise it looks like this (this will be the typical experience):

Technical Details

See #24032 (comment)

Comments

[civibot]

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[seamuslee001]

This looks right to me I'll give it an r-run locally shortly

[seamuslee001]

I r-runed this locally and confirmed it works as expected good to go