V2 rename bootstrap and remove scripts

[fgiorgetti]

Is your feature request related to a problem? Please describe. In order to standardize v2 commands and script, we need to rename both bootstrap.sh and remove.sh scripts (cmd/bootstrap) to nonkube-setup.sh and nonkube-teardown.sh (respectively).

This is needed because refdog will be updated to incorporate setup and teardown commands for nonkube sites, to replace the temporary bootstrap binary.

Describe the solution you'd like Rename the following files:

• cmd/bootstrap/bootstrap.sh to cmd/bootstrap/nonkube-setup.sh
• cmd/bootstrap/remove.sh to cmd/bootstrap/nonkube-teardown.sh

[fgiorgetti]

More appropriate names could be:

• system-setup.sh and system-teardown.sh