fix(atsu/efb): use msfs metar rather than fsx cloud data

[tracernz]

Fixes #[issue_no]

Summary of Changes

The FSX cloud data seems to have stopped updating a couple of days ago. Instead we get METARs from the sim with the API that was added a few updates back when the MSFS option is selected.

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub):

Testing instructions

Test that METARs work on the EFB home screen and in the ATSU on the MCDU with the MSFS option selected, that they are the current date, and that they match the METAR shown in the VFR MAP. Check one of the other sources e.g. VATSIM to make sure it is still okay as well.

How to download the PR for QA

Every new commit to this PR will cause a new A32NX artifact to be created, built, and uploaded.

1. Make sure you are signed in to GitHub
2. Click on the Checks tab on the PR
3. On the left side, click on the bottom PR tab
4. Click on the A32NX download link at the bottom of the page

[svengcz]

LGTM

[Saschl]

QA Report

Tester: saschl
Date: 19.10.2023

Report:

1. Entered multiple ICAOs in the EFB weather widget and MSFS as source and correct and up to date metar was returned
   

2. Performed the same inside ATSU and report matched with the data seen in the EFB.

Result:
Passed