fix: propagate context to sub requests

What does this MR do?

Propagate context on subrequests. See https://blog.golang.org/context

Fix http request with missing context and ensure the context is propagated properly to subrequests.

TODO

• I added the Changelog trailer (e.g. Changelog: feature) to the commits that need to be included in the changelog
• I added unit tests or they are not required
• I added acceptance tests or they are not required
• I added documentation (or it's not required)
• I followed code review guidelines
• I followed Go Style guidelines

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