Infer apiVersion from KUBERNETES_EXEC_INFO environment variable (#1162)

* Infer apiVersion from KUBERNETES_EXEC_INFO

* Test client.authentication.k8s.io/v1

* Set --exec-interactive-mode

* Set --exec-interactive-mode=Never

* Fix comments

mocks/github.com/int128/kubelogin/pkg/credentialplugin/reader_mock/mock_Interface.go

@@ -0,0 +1,90 @@
+// Code generated by mockery v2.46.3. DO NOT EDIT.
+
+package reader_mock
+
+import (
+	credentialplugin "github.com/int128/kubelogin/pkg/credentialplugin"
+	mock "github.com/stretchr/testify/mock"
+)
+
+// MockInterface is an autogenerated mock type for the Interface type
+type MockInterface struct {
+	mock.Mock
+}
+
+type MockInterface_Expecter struct {
+	mock *mock.Mock
+}
+
+func (_m *MockInterface) EXPECT() *MockInterface_Expecter {
+	return &MockInterface_Expecter{mock: &_m.Mock}
+}
+
+// Read provides a mock function with given fields:
+func (_m *MockInterface) Read() (credentialplugin.Input, error) {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for Read")
+	}
+
+	var r0 credentialplugin.Input
+	var r1 error
+	if rf, ok := ret.Get(0).(func() (credentialplugin.Input, error)); ok {
+		return rf()
+	}
+	if rf, ok := ret.Get(0).(func() credentialplugin.Input); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(credentialplugin.Input)
+	}
+
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockInterface_Read_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Read'
+type MockInterface_Read_Call struct {
+	*mock.Call
+}
+
+// Read is a helper method to define mock.On call
+func (_e *MockInterface_Expecter) Read() *MockInterface_Read_Call {
+	return &MockInterface_Read_Call{Call: _e.mock.On("Read")}
+}
+
+func (_c *MockInterface_Read_Call) Run(run func()) *MockInterface_Read_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockInterface_Read_Call) Return(_a0 credentialplugin.Input, _a1 error) *MockInterface_Read_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+func (_c *MockInterface_Read_Call) RunAndReturn(run func() (credentialplugin.Input, error)) *MockInterface_Read_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
+// NewMockInterface creates a new instance of MockInterface. It also registers a testing interface on the mock and a cleanup function to assert the mocks expectations.
+// The first argument is typically a *testing.T value.
+func NewMockInterface(t interface {
+	mock.TestingT
+	Cleanup(func())
+}) *MockInterface {
+	mock := &MockInterface{}
+	mock.Mock.Test(t)
+
+	t.Cleanup(func() { mock.AssertExpectations(t) })
+
+	return mock
+}