Disable flashbots toggle on appropriate chains

[walmat]

Fixes APP-1560

What changed (plus any additional context for devs)

Screen recordings / screenshots

What to test

[linear[bot]]

APP-1560 Disabled flashbots toggle (and set to off) for chains that don't support it

[jinchung]

Testing scenarios: (@ibrahimtaveras00 )

• default with mainnet asset -> review panel should show flashbots disabled but toggleable
• switching to another mainnet asset -> flashbots disabled but toggleable
• toggling flashbots on -> switching to another mainnet asset -> flashbots enabled and toggleable
• switching to a non-mainnet asset -> flashbots disabled and not toggleable
• switching to a mainnet asset -> flashbots enabled and toggleable
• toggling flashbots off -> switching to another mainnet asset -> flashbots disabled and toggleable
• switching to non-mainnet asset -> flashbots disabled and not toggleable
• close the swaps flow -> come back to mainnet default -> flashbots disabled and toggleable
• turn on flashbots -> close the swaps flow -> come back to mainnet default -> flashbots enabled and toggleable