Compare currencies as well as amounts on template Contribution change

[artfulrobot]

Overview

Follow up from #21473

if the currency is the only thing that has changed, e.g. it's in as 10USD but should be 10GBP, then the comparison will not pick it up since we pass only one currency in the comparator function, so 10 === 10, i.e. unchanged.

Before

Change currency on template contribution; Contribution Recur unchanged.

After

Change currency on template contribution; Contribution Recur changed.

[civibot]

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