feat(transaction-pay): add ordered strategy fallback orchestration

[pedronfigueiredo]

Explanation

As per preemptive validation on #7806

• Adds ordered strategy retrieval via TransactionPayController:getStrategies while preserving existing getStrategy behavior.
• Adds compatibility filtering (supports(...)) during strategy selection.
• Implements quote fallback orchestration:
  • try next strategy when quote retrieval fails
  • try next strategy when quote list is empty
  • skip unsupported strategies
• Implements publish-hook fallback orchestration:
  • execute primary strategy from existing quote strategy
  • on execution failure, rebuild quote requests and try next compatible strategy
  • throw original primary error if all fallback attempts fail

References

Addresses https://github.com/MetaMask/MetaMask-planning/issues/6992

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Touches core quote-selection and refresh logic and changes which strategy is executed at publish time; ordering/fallback mistakes could cause missing quotes or incorrect submission paths, though changes are well covered by unit tests.

Overview
TransactionPayController now supports an ordered getStrategies callback (with fallback to the legacy getStrategy and to a feature-flag-driven default order) and passes this ordered list through quote refresh/update flows.

Quote retrieval (updateQuotes/getQuotes) has been reworked to iterate strategies in order, optionally apply per-strategy supports(...) filtering, skip unknown strategies, and fall back on errors/empty quotes (including batch-transaction failures). The publish hook now executes using the strategy encoded in the stored quote instead of re-resolving it from controller state.

Adds a new remote feature flag confirmations_pay.strategyOrder (with validation/deduping) and updates tests/docs/changelog accordingly.

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

[matthewwalsh0]

Minor, as I assume this isn't used anymore, but do we need the ternary here since the fallback strategies are retrieved within getStrategiesWithFallback?

[matthewwalsh0]

Is this not a string[]?

[matthewwalsh0]

As this is a constant, do we need a type, and why is it [X, ...X[]]?

[matthewwalsh0]

Maybe strategyPriority?

[matthewwalsh0]

uniq from lodash?

[matthewwalsh0]

Minor, maybe a getStrategiesByName util?