[component helper] Adding lifecycle state management to *helper.

[MovieStoreGuy]

Description:

Extending the current helpers to adhere to the current component expectations

Link to tracking Issue:
#6507

Testing:

Haven't extended the tests yet, but my intention is to extend the lifecycle test to check if a component can:

• Allow for partial shutdown
• is restartable

Documentation:
Haven't added it yet, just wanting to get feedback to check the approach.

[MovieStoreGuy]

The current components Processor, Extension don't have helpers at this point, is worth me adding it as part of this PR?

[bogdandrutu]

Suggested change

	// Lifecycle represents the current
	// running state of the component
	// that is intended to be concurrency safe.
	type State interface {
	// Start atomically updates the state and returns true if
	// the previous state was not running.
	Start() (started bool)
	// Stop atomically updates the state and returns true if
	// the previous state was not shutdown.
	Stop() (stopped bool)
	}
	// This will implement component.Component.
	type Component struct {
	current *atomic.Int64
	component.StartFunc
	component.ShutdownFunc
	}
	func NewComponent(start component.StartFunc, shutdown component.ShutdownFunc) *Component {
	return &Component{
	current: atomic.NewInt64(shutdown),
	StartFunc: start,
	ShutdownFunc: shutdown
	}
	}
	func (c *Component) Start(ctx context.Context, host component.Host) error {
	if s.current.Swap(running) != shutdown {
	return nil
	}
	c.StartFunc.Start(ctx, host)
	}
	func (c *Component) Shutdown(ctx context.Context) error {
	if s.current.Swap(running) != running {
	return nil
	}
	c.ShutdownFunc.Shutdown(ctx)
	}

[bogdandrutu]

Then in the exporterhelper can have

type baseExporter struct {
	*lifecyle.Component
}

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 14 days.

[bogdandrutu]

The current components Processor, Extension don't have helpers at this point, is worth me adding it as part of this PR?

https://github.com/open-telemetry/opentelemetry-collector/blob/main/processor/processorhelper/traces.go#L39

[MovieStoreGuy]

Sorry @bogdandrutu , I've moved the PR over to #6702 since I messed up my local git.