Set GOMAXPROCS and GOMEMLIMIT

[phillebaba]

Describe the problem to be solved

Currently we do not set GOMAXPROCS and GOMEMLIMIT which means that the defaults will be used based on the host machine and not the container resources. This can have repercussions like CPU throttling due to Spegel using more CPU than was actually allocated.

Proposed solution to the problem

Good example for how to set this in the Helm chart based on resource limits.

https://gitlab.com/gitlab-org/charts/gitlab-agent/-/merge_requests/104

Another blog post with an example.

https://metoro.io/blog/go-production-performance-gotcha-gomaxprocs

We should use the benchmarks to measure the performance to see if there is any difference when configuring these values.