## Description
This PR adds all the scaffolding for tests that require remote servers. It is mostly a refactor of `Feature`; where we listed for each test a list of individual backends, we now provide a list of `Context`s, that allows for tests to specify not only how it should be setup, but also what state needs to be carried around throughout the test. This will be useful when launching custom remote servers.
Additionally, this PR:
- cleans the way we generate logs in the engine as part of the tests
- cleans the cabal file
- introduce a few more helpers for sending commands to the engine (such as `postMetadata_`)
- allows for headers in queries sent to the engine (to support permissions tests)
- adds basic code to start / stop a "remote" server
This PR is a pre-requisite of #3567.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/3573
Co-authored-by: jkachmar <8461423+jkachmar@users.noreply.github.com>
GitOrigin-RevId: 05f808c6b85729dbb3ea6648c3e10a3c16b641ef
