* fix: namespace logic cleanup and test isolation
- Pulls logic for defaulting to active namespace (K8S) moved UP to CLI during
flag default calculation.
- Pushes logic of deciding between f.Namespace vs f.Deploy.Namespace down into
implementations.
- Updates some tests which needed to have their environment cleared.
- Refactors Pipelines tests to use client API.
- Removes namespaces as a state variable all structures, instead passing as
an argument.
- Moves FromTempDirectory to testing package for use outside cmd.
* fix spelling errors
* fix: pipelines remover always returned (empty) error
* update tekton namespace handling
* fix: remove deprecated GitLab config: max_concurrency
In order to not conflict with (and be confused with) the actual Instance
struct name which is introduced in the scaffolding func runtimes
middleware, the Instance struct herein is renamed InstanceRefs to more
accurately reflect its usage as a manager of references to instances.