cleanup tests, maybe fix windows fails?

Author: Lms24

packages/integration-tests/fixtures/errorhandling/build-esbuild.ts

@@ -5,7 +5,7 @@ import path from "path";
 
 build({
   entryPoints: [path.join(__dirname, "input", "bundle.js")],
-  outdir: "./out/esbuild",
+  outdir: path.join(__dirname, "out", "esbuild"),
   plugins: [sentryEsbuildPlugin(pluginOptions)],
   minify: true,
   bundle: true,

packages/integration-tests/fixtures/errorhandling/error-no-handler.test.ts

@@ -9,7 +9,7 @@ jest.setTimeout(10_000);
 describe("Error throwing by default (no errorHandler)", () => {
   const FAKE_SENTRY_PORT = "9876";
 
-  const sentryServer = spawn("node", ["fakeSentry.js"], {
+  const sentryServer = spawn("node", [path.join(__dirname, "fakeSentry.js")], {
     cwd: __dirname,
     stdio: "ignore", // <-- set to "inherit" to get server logs. Deactivated to avoid test logs.
     env: { ...process.env, FAKE_SENTRY_PORT },