feat: setup nightly tests for postgres and mysql schemas (#4441)

* feat: unify Jest config

* feat: simplify DB setup for tests

* feat: setup nightly tests for postgres and mysql schemas

jest.config.js

@@ -0,0 +1,21 @@
+const { compilerOptions } = require('./tsconfig.json');
+
+/** @type {import('jest').Config} */
+module.exports = {
+	verbose: true,
+	preset: 'ts-jest',
+	testEnvironment: 'node',
+	testRegex: '\\.(test|spec)\\.(js|ts)$',
+	testPathIgnorePatterns: ['/dist/', '/node_modules/'],
+	globals: {
+		'ts-jest': {
+			isolatedModules: true,
+			tsconfig: {
+				...compilerOptions,
+				declaration: false,
+				sourceMap: false,
+				skipLibCheck: true,
+			},
+		},
+	},
+};