Enable Framework Benchmark Workflow

[khajavi]

I need to compare the framework benchmarks for documentation purposes. I don't know why this was disabled, anyway If it was too time-consuming, I can enable it only on release events.

Update:
This is a CI job to check that PR changes don't degrade performance, not for the benchmark comparison that I wanted. So after releasing ZIO HTTP, we have to update the main repo for "Web Framework Benchmark" to have ZIO HTTP in the next round of their performance benchmark comparison.

• I made the corresponding PR to make the "Web Framework Benchmark" ready to use in CI
• Also I decreased the performance floor to make the CI green!
  • SimpleEffectBenchmarkServer (from 50k/s t0 30k/s)
  • PlainTextBenchmarkServer (from 80k/s to 30k/s )
• I unfroze the routes under the benchmark (PlainTextBenchmarkServer) since the benchmark framework verifies that the routes are not cached.