test(session): load tests for session api (#9212)

# Which Problems Are Solved

We currently are not able to benchmark the performance of the session
api

# How the Problems Are Solved

Load tests were added to
- use sessions in oidc tokens analog
https://zitadel.com/docs/guides/integrate/login-ui/oidc-standard

# Additional Context

- Closes https://github.com/zitadel/zitadel/issues/7847

load-test/webpack.config.js

@@ -5,7 +5,7 @@ const GlobEntries = require('webpack-glob-entries');
 
 module.exports = {
   mode: 'production',
-  entry: GlobEntries('./src/use_cases/*.ts'), // Generates multiple entry for each test
+  entry: GlobEntries('./src/use_cases/**/*.ts'), // Generates multiple entry for each test
   output: {
     path: path.join(__dirname, 'dist'),
     libraryTarget: 'commonjs',