refactor: remove old token metadata processor (#1747)

* refactor: remove old processor, start fetching data from contract

* refactor: remove old tests

* fix: tests and lint

* fix: use lru cache

* chore: delete old tables

* chore: fix comments [skip ci]

* fix: env comment block [skip ci]

* chore: avoid duplicate RPC lookups

* fix: make an incremental migration to drop tables

* fix: re-add metadata processing ENV flag

---------

Co-authored-by: Matthew Little <zone117x@gmail.com>

tests/jest.config.tokens-metadata.js

@@ -1,13 +0,0 @@
-module.exports = {
-    preset: 'ts-jest',
-    rootDir: `${require('path').dirname(__dirname)}/src`,
-    testMatch: ['<rootDir>/tests-tokens-metadata/*.ts'],
-    testPathIgnorePatterns: ['<rootDir>/tests-tokens-metadata/setup.ts', '<rootDir>/tests-tokens-metadata/teardown.ts'],
-    collectCoverageFrom: ['<rootDir>/**/*.ts'],
-    coveragePathIgnorePatterns: ['<rootDir>/tests*'],
-    coverageDirectory: '<rootDir>/../coverage',
-    globalSetup: '<rootDir>/tests-tokens-metadata/setup.ts',
-    globalTeardown: '<rootDir>/tests-tokens-metadata/teardown.ts',
-    testTimeout: 60000,
-    verbose: true,
-  }

tests/jest.config.tokens-strict.js

@@ -1,13 +0,0 @@
-module.exports = {
-    preset: 'ts-jest',
-    rootDir: `${require('path').dirname(__dirname)}/src`,
-    testMatch: ['<rootDir>/tests-tokens-strict/*.ts'],
-    testPathIgnorePatterns: ['<rootDir>/tests-tokens-strict/setup.ts', '<rootDir>/tests-tokens-strict/teardown.ts'],
-    collectCoverageFrom: ['<rootDir>/**/*.ts'],
-    coveragePathIgnorePatterns: ['<rootDir>/tests*'],
-    coverageDirectory: '<rootDir>/../coverage',
-    globalSetup: '<rootDir>/tests-tokens-strict/setup.ts',
-    globalTeardown: '<rootDir>/tests-tokens-strict/teardown.ts',
-    testTimeout: 60000,
-    verbose: true,
-  }

tests/jest.config.tokens.js

@@ -1,13 +0,0 @@
-module.exports = {
-    preset: 'ts-jest',
-    rootDir: `${require('path').dirname(__dirname)}/src`,
-    testMatch: ['<rootDir>/tests-tokens/*.ts'],
-    testPathIgnorePatterns: ['<rootDir>/tests-tokens/setup.ts', '<rootDir>/tests-tokens/teardown.ts'],
-    collectCoverageFrom: ['<rootDir>/**/*.ts'],
-    coveragePathIgnorePatterns: ['<rootDir>/tests*'],
-    coverageDirectory: '<rootDir>/../coverage',
-    globalSetup: '<rootDir>/tests-tokens/setup.ts',
-    globalTeardown: '<rootDir>/tests-tokens/teardown.ts',
-    testTimeout: 60000,
-    verbose: true,
-  }