Update XCM tutorials with new multilocation and weight/proof size info

[themacexpert]

Description

Updates the 3 XCM tutorials with the latest method for calculating the multi-location derivative account and updates outdated weight / proof size info. I suspect there are other places in the docs where I'll need to update this info as well, for scope this PR encompasses only the tutorials section.

Checklist

• If this requires translations for the moonbeam-docs-cn repo, I have created a ticket for the translations in Jira
• If pages have been moved around, I have created an additional PR in moonbeam-mkdocs to update redirects
• If pages have been moved around, I have run the move-pages.py script to move the pages and update the image paths on the chinese repo
  • After the script has been run, I have created an additional PR in moonbeam-docs-cn
• If images have been added, I have run the compress-images.py script to compress the images.
• If variables (in variables.yml) need to be updated (such as a name change), I have updated the moonbeam-docs-cn repo to use the new variables
• If this page requires a disclaimer, I have added one

Corresponding PRs

moonbeam-foundation/moonbeam-docs-cn#291
Jira for Translations: DR-1426

After Translation Requirements

• Will need to create PR in moonbeam-docs repo to remove images
• Will need to create PR in moonbeam-docs repo to remove variables
• Will need to create PR in moonbeam-mkdocs repo to add redirects for Chinese site
• No additional PRs are required after the translations are done

Items to be Updated

Please list any of the items that will need to be added or deleted after the translations are done here.

[eshaben]

Awesome! Thanks so much for doing this. I've left a few comments on some standards, but it all looks good!

[themacexpert]

Should be all set now!

[eshaben]

Works like a charm! ✨ LGTM!