Review pytests for nginx modules

[pdabelf5]

The pytests for agent & otel should ideally be done on all image types to ensure we don't miss any modules on certain images. Design a new test job to validate images and modules. e.g.

{
  [
    {
       "image": "debian",
       "modules":
         - nginx-module-njs
         - nginx-module-otel
         - nginx-module-image-filter
         - nginx-module-xslt
    },
    {
       "image": "debian-plus",
       "modules":
         - nginx-plus-module-njs
         - nginx-plus-module-otel
         - nginx-plus-module-fips-check
    },
    {
       "image": "debian-plus-nap",
       "modules":
         - nginx-plus-module-njs
         - nginx-plus-module-otel
         - nginx-plus-module-fips-check
         - nginx-plus-module-appprotect
         - nginx-agent
    },
  ]
}