present credential when polling for project readiness

[polvorin]

Right now the cmd doesn't present its credential on the secure channel, when polling until the project is accessible here.

This need to be changed, as a future change will prevent such connections to be established. The cmd always need to present its credential when establishing a secure channel to the project node. The places where we don't present credentials is when testing that the project' listener is accessible, in:

• enroll
• project creation
• project addon configuration (I think)

Unfortunately, it isn't as easy as setting credentials enabled here for a number of reasons:

• The project might is not yet stored at that point, if it was just created (for example after enroll), and is referenced through name instead of passing the project' data directly.
• More importantly, when creating the project client the "CredentialRetrieverCreator" is obtained from the underling node . And this node was created without any, because it was created just at the start of the enroll to talk to the controller. An attempt trying to create another InMemoryNode  after the project was created did not look promising (got error on 0#ockam.ping.collector (origin: Node, kind: AlreadyExists, , that indicate there are assumptions we broke if instantiating a new InMemoryNode). Changing it after the node was created seems possible? but I also failed on that attempt so letting it here for someone with more background on this to take over.