use `minikube start --mount` to mount filesystem

[mplsgrant]

Issue

I can't mount my host's directory to minikube's /mnt/src directory.

Cause

Our current minikube mount approach requires the use of the 9p filesystem but debian cloud as well as cent os and red hat all have issues supporting 9p.

Solution

Place minikube start --mount --mount-string="$PWD:/mnt/src" inside warnet's justfile start command.

Note: This fix requires that we run minikube delete on each invocation of just start. This is because docker has an issue with re-mounting filesystems, and the minikube delete approach to sidestepping this limitation comes recommended.

Rationale

• The current justfile already relies on minikube.
• It simplifies our mounting logic (no more pid management).
• It passes CI.

[willcl-ark]

Sorry I re-triggered CI to see if it will pass. I think it will if you rebase on main now (🤞🏼 )