- For now, hardcode them to TRANSFER on the rust encoder side. This will be fixed in an upcoming PR.
- Remove the split swap simple route integration test - seemed overkill since simple routes are tested in many other integration tests, the original rust test named doesn't exist anymore, and simple routes should anyway be passing through the single endpoint.
- Add more test cases for sequential swap and single swap to match those of split swap (fee, slippage), to catch errors more easily if someone makes a small code change to either the single or sequential methods
- Excluded USV3 and USV4 tests on sequential and single swap, since these tests were more to test USV3 and USV4 executor functionality than the high level sswap methods - they should already be sufficiently tested.
- Remove `testSplitSwapSimple` and `testSplitSwapSingleUSV3` since this is already tested by several other high-level methods (see single USV3 and single USV4 tests). We should prioritize integration-testing public methods over private methods.
