ADX-1046 No longer need _dont_validate context param

[jonathansberry]

Description

The _dont_validate context param appears to have only been used to avoid triggering package validation when patching the package with the finalised validation_status.

Since we have properly implemented a change to avoid metadata changes triggering package validation, this is no longer needed. Context params like this are a bit dodgy and it is best to clean it up if we can.

Checklist

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• The Jira ticket for this issue has been updated to "Ready to Review" or equivalent.
• I have developed these changes in discussion with the appropriate project manager.
• My code follows the general Fjelltopp documentation (see Confluence).
• I have made corresponding changes to the Fjelltopp documentation (see Confluence).
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• New dependency changes have been committed.
• I have added automated tests that prove my fix is effective or that my feature works.
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