smoke: update latest version scripts to use snapshots.elastic.co

[isaacaflores2]

Motivation/summary

Updating scripts to migrate away fromartifacs-api.elastic.co. This should Improve smoke test reliability since artifacts-api.elastic.co is not always available

Note there are two alternate APIs we can use:

1. https://artifacts-snapshot.elastic.co/ is used for the DRA artifacts and manifests produced by developments team
   • This one seems to be updated more frequently
2. https://snapshots.elastic.co/ is used for the daily unified-release-snapshot builds

Since the smoke test runs once a day, I think both are fine. I opted for snapshots.elastic.co since it used for the snapshot builds. Please let me know if you think we should use artifacts-snapshot.elastic.co instead.

Checklist

For functional changes, consider:

• Is it observable through the addition of either logging or metrics?
• Is its use being published in telemetry to enable product improvement?
• Have system tests been added to avoid regression?

How to test these changes

1. Ran the both scripts locally
2. Ran the smoke test workflow against the updated branch

Related issues

Closes #17071

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[mergify]

This pull request does not have a backport label. Could you fix it @isaacaflores2? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-7.17 is the label to automatically backport to the 7.17 branch.
• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.
• backport-9./d is the label to automatically backport to the 9./d branch. /d is the digit.
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.