fix: swap+send e2e tests

[dbrans]

Description

418ecfc was moved from #25230 into this separate PR.

@micaelae wrote:

the main change in the commit is to update the test ganache network. we were configuring the tests without EIP-1559 support before. and as a result, gas fees in the Send page were calculated using the response of https://gas.api.cx.metamask.io/networks/1/gasPrices. afaik the response was getting mocked to a constant value before so the tests succeeded reliably.
after your change, the response of that endpoint became variable. which made me look into why the gas fees were excessively high within the test in the first place
since the Swap+Send experience only runs in networks that support EIP-1559, I updated the test network. as a result the tests now use the suggestedGasFees endpoint mock, which also corrected the gas calculation test bug

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[metamaskbot]

Missing release label release-12.0.0 on PR. Adding release label release-12.0.0 on PR and removing other release labels(release-12.1.0), as PR was cherry-picked in branch 12.0.0.