Add mainnet chains and token config unit-tests

[claudijd]

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These unit-tests are mainly just to ensure a mainnet config update doesn't result in a regression of config expectations.

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[claudijd]

@jynnantonix awesome review, thank you! Fixes are up!

[claudijd]

now blocked by https://github.com/wormhole-foundation/wormhole/pull/1452 (the schema expectation has changed, might want to add another set of checks for big transfers)

[jynnantonix]

Looks like the checks were stale because a couple of these tests are broken on dev.v2. See #1485 for the fix.