test: set env before important to allow import-time conditional code paths

Author: pieh

tests/utils/lambda-helpers.mjs

@@ -115,12 +115,12 @@ export async function loadAndInvokeFunctionImpl(
   ctx,
   { headers, httpMethod, flags, url, env } = {},
 ) {
+  const restoreEnvironment = temporarilySetEnv(ctx, env)
+
   const { handler } = await import(
     'file:///' + join(ctx.functionDist, SERVER_HANDLER_NAME, '___netlify-entry-point.mjs')
   )
 
-  const restoreEnvironment = temporarilySetEnv(ctx, env)
-
   let resolveInvocation, rejectInvocation
   const invocationPromise = new Promise((resolve, reject) => {
     resolveInvocation = resolve