Nginx 1.10 does not support OpenTracing. Nginx tracing need to be migrated to OpenTelemetry

[ricsanfre]

Issue description

nginx ingress controller v1.10 breaks current Opentracing configuration:

nginx controller does not start with the following message:

-------------------------------------------------------------------------------
  Warning  RELOAD  117s  nginx-ingress-controller  Error reloading NGINX: 
-------------------------------------------------------------------------------
Error: exit status 1
2024/03/02 09:56:48 [emerg] 27#27: unknown "opentracing_context_x_b3_traceid" variable
nginx: [emerg] unknown "opentracing_context_x_b3_traceid" variable
nginx: configuration file /tmp/nginx/nginx-cfg3140476767 test failed

According to 1.10 release notes

• This version dropped Opentracing and zipkin modules, just Opentelemetry is supported as of this release