Handling source id / refund id / intent ids metas in the order helper class

[wjrosa]

Base PR #4613
P2 peNR48-1Jc-p2

Changes proposed in this Pull Request:

As part of the Order Helper class project, I am including some additional meta keys to be handled by the new class and implementing the new methods across our codebase.

The metas handled here are: _stripe_source_id, _stripe_refund_id, _stripe_intent_id, and _stripe_setup_intent.

Testing instructions

• Code review
• Check if the tests are still passing
• Perform some basic smoke testing to confirm no regression was introduced

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• Covered with tests (or have a good reason not to test in description ☝️)
• Tested on mobile (or does not apply)

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Post merge

• Added testing instructions to the Release Testing Instructions wiki page (or does not apply)
• Added the needs docs label (or does not apply)
• Included this PR in the Release Thread scope (or does not apply)

[malithsen]

Thanks for these changes. Looks good overall. Requesting changes due to missing parameters in some of the update* functions.

[malithsen]

Thanks Wesley

This looks good to me

[annemirasol]

LGTM! Smoke tested on simple purchases, subscriptions and renewals.

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