feat(lightning): set max dust

[Jasonvdb]

Description

Dev setting for manually overriding the default values max_dust_htlc_exposure_type and max_dust_htlc_exposure.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (improving code without creating new functionality)

Tests

• Detox test
• Unit test
• No test

Screenshot / Video

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QA Notes