dev/core#2493 Add support for money laundry in getSubmittedValue

[eileenmcnaughton]

Overview

This ensures that any money fields retrieved by getSubmittedValue are
in a machine usable format.

https://lab.civicrm.org/dev/core/-/issues/2493#note_65321

Before

You might clean the money fields post submit but if you then access them using our increasingly-preferred helper you'll get the unclean version

After

The helper will launder your money

Technical Details

We've been switching to this function rather than 'passing around arrays'
but we need to ensure this function is returning clean money to
prevent regressions.

Comments

This relies on submittableMoneyFields being defined - which is fairly uniformly true in back office forms but needs work in front end forms

[civibot]

(Standard links)

• If this is your first pull-request for CiviCRM, please browse CONTRIBUTING.md for information about the development and testing processes.
• If you are reviewing this pull-request, you may wish to consult the test sites and the Review Standards (long template, short template).

[eileenmcnaughton]

@mattwire the original reason I put this PR up is 'on hiatus' - but my guess is that if we don't merge this then sooner or later we will by-pass our money laundry when using getSubmittedValue which always works on the raw submitted value