Ensure GOMAXPROCS & GOMEMLIMIT align with K8s limits

[lburgazzoli]

Description

Set GOMAXPROCS and GOMEMLIMIT based on the CPU/memory limits
defined in the deployment manifests. This ensures optimal
resource utilization and prevents performance degradation
caused by CPU throttling or OOM issues in containerized Go apps.

References:

• https://www.ardanlabs.com/blog/2024/02/kubernetes-cpu-limits-go.html
• https://www.ardanlabs.com/blog/2024/02/kubernetes-memory-limits-go.html

Note

As of today, we do configure the operator Deployment with some
resources requests and limits, however, we do not configure the go
runtime according. At this stage this is just an hypothesis, but since
that on a large cluster, the GOMAXPROCS would be automatically
set to the number of cores, resulting in a sub-optimal setup as the
go runtime would assume it can use all the cores, However, we set
500m as resource limit for CPU so we won't be able to use more than
a single thread.

How Has This Been Tested?

Screenshot or short clip

Merge criteria

• You have read the contributors guide.
• Commit messages are meaningful - have a clear and concise summary and detailed explanation of what was changed and why.
• Pull Request contains a description of the solution, a link to the JIRA issue, and to any dependent or related Pull Request.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 23.96%. Comparing base (06a1b25) to head (c49a4d0).

Files with missing lines	Patch %	Lines
pkg/cluster/cluster_config.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1755      +/-   ##
==========================================
- Coverage   23.97%   23.96%   -0.02%     
==========================================
  Files         172      172              
  Lines       11699    11704       +5     
==========================================
  Hits         2805     2805              
- Misses       8614     8619       +5     
  Partials      280      280              

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