Make proxy_next_upstream_tries configurable

[maxlaverse]

What this PR does / why we need it:
On deployments running a large number of pods, it is not desired to have Nginx retry failed requests as many times as they are pods. This PR makes proxy_next_upstream_tries configurable on the Nginx Ingress level through a ConfigMap, and on the Ingress leve with annotations.

[maxlaverse]

/assign @nicksardo

[aledbf]

@maxlaverse please rebase, run make code-generator and commit the changes

[codecov-io]

Codecov Report

Merging #2232 into master will increase coverage by 0.02%.
The diff coverage is 88%.

@@            Coverage Diff            @@
##           master   #2232      +/-   ##
=========================================
+ Coverage   36.97%     37%   +0.02%     
=========================================
  Files          71      71              
  Lines        5001    5008       +7     
=========================================
+ Hits         1849    1853       +4     
- Misses       2869    2872       +3     
  Partials      283     283

Impacted Files	Coverage Δ
internal/file/bindata.go	51.8% <ø> (ø)	⬆️
internal/ingress/controller/controller.go	0% <0%> (ø)	⬆️
internal/ingress/controller/config/config.go	98.05% <100%> (+0.01%)	⬆️
internal/ingress/annotations/proxy/main.go	57.89% <66.66%> (+0.14%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4f5fa47...e34664d. Read the comment docs.

[aledbf]

/approve

[aledbf]

@maxlaverse thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, maxlaverse

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [aledbf]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment