make run-on-kind enhancements

[anfredette]

By default, make run-on-kind

• builds and uses local images for bpfman-operator and bpfman-agent
• uses the remote version of quay.io/bpfman/bpfman:latest

Consider adding the following new options:

BPFMAN_LOCAL=1 make run-on-kind

• uses the local version of whatever BPFMAN_IMG is set to
• by default, this is the local version of quay.io/bpfman/bpfman:latest

BPFMAN_REMOTE=1 make run-on-kind

• use the remote versions of everything
• This allows someone to quickly spin up a cluster w/bpfman without building anything for kicking the tires or testing.

Originally posted by @anfredette in #113 (comment)