Replace `evmIdSchema` and `evmAddressSchema` with commons

[mcoetzee]

Originally posted by @Siegrift in #488 (comment)

This warranted a new task because it affects a fair amount of code (the repo has addresses and hex values typed as string, and this changes those types to '0x${string}').

// packages/airnode-feed/src/validation/schema.ts
import { addressSchema, keccak256HashSchema } from '@api3/commons';

...

export const evmIdSchema = keccak256HashSchema;