Tests being skipped because TAU_TEST_GIT_TOKEN -> TEST_GIT_TOKEN

[samyfodil]

During a refactor environment variable TAU_TEST_GIT_TOKEN was changed to TEST_GIT_TOKEN

Some tests were disabled because of that. A solution is to add backward compatibility here https://github.com/taubyte/tau/blob/main/libdream/helpers/variables.go#L53
meaning: I can use TAU_TEST_GIT_TOKEN or TEST_GIT_TOKEN

Once that done, re-activate all tests affected by the issue like: https://github.com/taubyte/tau/blob/main/clients/p2p/auth/client_test.go

When testing you need to use a valid github token like this:

TEST_GIT_TOKEN=<valid-github-token-here> go test ./... -p 1

Some tests will run containers, so you'll need to have docker installed
Also, I recommend running with -p 1 as some tests are resource heavy