Product analytics dotnet sdk test

What does this MR do and why?

• Adding a test for Product Analytics to check that events from .NET SDK are processed and shown on Product Analytics dashboards. This test is to be run only for product-analytics/devkit for now. This test is needed to verify events from .NET SDK are sent to Product Analytics and precessed successfully by its pipelines.

Successful execution in Product Analytics devkit pipeline using gitlab-qa docker image built from this branch - https://gitlab.com/gitlab-org/analytics-section/product-analytics/devkit/-/jobs/6817170827

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Test passing locally screenshot

How to set up and validate locally

Not required. Please refer to this guide if you like to run the test locally.

Note the following:

• PA_COLLECTOR_HOST variable should be set to http://caddy:80.
• For DotnetSdkApp class set @host_name = 'localhost' when running locally against GKD.