feat(STX-169): test disable transaction-controller automatic gas fee update

[rarquevaux]

Explanation

The goal of this PR is to make sure the automatic gas fee update is disabled when isAutomaticGasFeeUpdateEnabled returns false.

References

• Related to feat(STX-169): test transaction-controller init for automatic gas fee config metamask-extension#36153

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, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

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Note

Adds a unit test verifying updateTransactionGasFees skips auto gas estimate updates when isAutomaticGasFeeUpdateEnabled returns false while still applying provided gas params.

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