Disable swaps whenever the environment is not development or testing, so that behaviour follows production for QA purposes (#14499)

ui/selectors/selectors.js

@@ -670,8 +670,10 @@ export function getSwapsDefaultToken(state) {
 
 export function getIsSwapsChain(state) {
   const chainId = getCurrentChainId(state);
-  const isProduction = process.env.METAMASK_ENVIRONMENT === 'production';
-  return isProduction
+  const isNotDevelopment =
+    process.env.METAMASK_ENVIRONMENT !== 'development' ||
+    process.env.METAMASK_ENVIRONMENT !== 'testing';
+  return isNotDevelopment
     ? ALLOWED_PROD_SWAPS_CHAIN_IDS.includes(chainId)
     : ALLOWED_DEV_SWAPS_CHAIN_IDS.includes(chainId);
 }