add project-id to gcs logging setting

[noguxun]

Done following tests

./fastly logging gcs create --name gcs4 \
--account-name test-account-id \
--bucket test-bucket-name \
--project-id test-project-id \
--path test-path \
--service-id $MY_SID --version $MY_VER --profile noguxun


./fastly logging gcs update --name gcs4 \
--project-id test-project-id-modified \
--path test-path-modified \
--service-id $MY_SID --version $MY_VER --profile noguxun


make test TEST_ARGS="-run TestGCSCreate ./pkg/commands/logging/gcs"

[Integralist]

@noguxun LGTM but the CI tests are failing (see screenshot)

[noguxun]

@Integralist , thanks for the review! I've just fixed the issue, the PR passed the CI now.