Remove Coarse Locking from API

[patrick-ogrady]

We should implement granular locking to prevent API calls from blocking consensus operations:

spacesvm/vm/vm.go

Lines 245 to 249 in 22a78d6

	var lock common.LockOption = common.WriteLock
	if len(lockOption) != 0 {
	lock = lockOption[0]
	}
	return &common.HTTPHandler{LockOptions: lock, Handler: server}, nil