Split internal system package

This changes splits the functionality in the internal system package
into two packages: one for dealing with devices and one for dealing
with kernel modules. This removes ambiguity around the meaning of
driver / device roots in each case.

In each case, a root can be specified where device nodes are created
or kernel modules loaded.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

internal/system/nvmodules/cmd_mock.go

@@ -0,0 +1,83 @@
+// Code generated by moq; DO NOT EDIT.
+// github.com/matryer/moq
+
+package nvmodules
+
+import (
+	"sync"
+)
+
+// Ensure, that cmderMock does implement cmder.
+// If this is not the case, regenerate this file with moq.
+var _ cmder = &cmderMock{}
+
+// cmderMock is a mock implementation of cmder.
+//
+//	func TestSomethingThatUsescmder(t *testing.T) {
+//
+//		// make and configure a mocked cmder
+//		mockedcmder := &cmderMock{
+//			RunFunc: func(s string, strings ...string) error {
+//				panic("mock out the Run method")
+//			},
+//		}
+//
+//		// use mockedcmder in code that requires cmder
+//		// and then make assertions.
+//
+//	}
+type cmderMock struct {
+	// RunFunc mocks the Run method.
+	RunFunc func(s string, strings ...string) error
+
+	// calls tracks calls to the methods.
+	calls struct {
+		// Run holds details about calls to the Run method.
+		Run []struct {
+			// S is the s argument value.
+			S string
+			// Strings is the strings argument value.
+			Strings []string
+		}
+	}
+	lockRun sync.RWMutex
+}
+
+// Run calls RunFunc.
+func (mock *cmderMock) Run(s string, strings ...string) error {
+	callInfo := struct {
+		S       string
+		Strings []string
+	}{
+		S:       s,
+		Strings: strings,
+	}
+	mock.lockRun.Lock()
+	mock.calls.Run = append(mock.calls.Run, callInfo)
+	mock.lockRun.Unlock()
+	if mock.RunFunc == nil {
+		var (
+			errOut error
+		)
+		return errOut
+	}
+	return mock.RunFunc(s, strings...)
+}
+
+// RunCalls gets all the calls that were made to Run.
+// Check the length with:
+//
+//	len(mockedcmder.RunCalls())
+func (mock *cmderMock) RunCalls() []struct {
+	S       string
+	Strings []string
+} {
+	var calls []struct {
+		S       string
+		Strings []string
+	}
+	mock.lockRun.RLock()
+	calls = mock.calls.Run
+	mock.lockRun.RUnlock()
+	return calls
+}