Add retry actions for platform webhook deliveries

[everettbu]

Mirror of supabase/supabase#43846
Original author: dnywh

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What kind of change does this PR introduce?

Feature / UX update.

What is the current behavior?

Platform webhook deliveries cannot be retried from the deliveries table or the delivery details sheet.

What is the new behavior?

• Adds a retry action to individual platform webhook deliveries in the endpoint deliveries table
• Adds a retry action to the shared delivery details sheet footer
• Limits retry to non-success deliveries
• Applies the table action hit area guidance from the design system

Successful deliveries should also not expose retry in this mock flow.

Additional context

• Addresses DEPR-340.
• In the current mock implementation, queueing updates the existing delivery in place: it sets the status to pending, clears responseCode, and refreshes attemptAt to the current timestamp.
• The mock does not create a separate queued job or append a new delivery record yet; the same delivery is resurfaced at the top of the list because deliveries are sorted by latest attempt time.

[github-actions]

🎭 Playwright Test Results

 157 passed
 5 skipped

Details

 162 tests across 20 suites
 2 minutes, 50 seconds
 d772a60

Skipped tests

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Features › sql-editor.spec.ts › SQL Editor › folders works as expected
Features › sql-editor.spec.ts › SQL Editor › other SQL snippets actions work as expected