fix: infer MA currency on PL create

[fPolic]

What

• a MoneyAmount record can be created with either providing region or currency. MA records cannot be inserted in the DB without currency due to not null constraints therefore the currency needs to be inferred from provided region

How

• by using the same utility that fixes this issue on PL update

Testing

• extend the "create PL" integration test to handle a MA with a region

---

FIXES CORE-525

[changeset-bot]

⚠️ No Changeset found

Latest commit: 1a7425d

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[srindom]

LGTM - w. a small nit in how the test is being set up up to you if you want to fix :)