[chore] Make internal Batcher interface generic (#12689)

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

exporter/exporterhelper/internal/batcher/batcher.go

@@ -14,17 +14,14 @@ import (
 )
 
 // Batcher is in charge of reading items from the queue and send them out asynchronously.
-type Batcher interface {
+type Batcher[K any] interface {
 	component.Component
-	Consume(context.Context, request.Request, queuebatch.Done)
+	Consume(context.Context, K, queuebatch.Done)
 }
 
-func NewBatcher(batchCfg exporterbatcher.Config,
-	exportFunc sender.SendFunc[request.Request],
-	maxWorkers int,
-) (Batcher, error) {
+func NewBatcher(batchCfg exporterbatcher.Config, exportFunc sender.SendFunc[request.Request], maxWorkers int) (Batcher[request.Request], error) {
 	if !batchCfg.Enabled {
-		return newDisabledBatcher(exportFunc), nil
+		return newDisabledBatcher[request.Request](exportFunc), nil
 	}
 	return newDefaultBatcher(batchCfg, exportFunc, maxWorkers), nil
 }

exporter/exporterhelper/internal/batcher/disabled_batcher.go

@@ -8,7 +8,6 @@ import (
 
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/exporter/exporterhelper/internal/queuebatch"
-	"go.opentelemetry.io/collector/exporter/exporterhelper/internal/request"
 	"go.opentelemetry.io/collector/exporter/exporterhelper/internal/sender"
 )
 
@@ -24,6 +23,6 @@ func (db *disabledBatcher[T]) Consume(ctx context.Context, req T, done queuebatc
 	done.OnDone(db.consumeFunc(ctx, req))
 }
 
-func newDisabledBatcher(consumeFunc sender.SendFunc[request.Request]) Batcher {
-	return &disabledBatcher[request.Request]{consumeFunc: consumeFunc}
+func newDisabledBatcher[K any](consumeFunc sender.SendFunc[K]) Batcher[K] {
+	return &disabledBatcher[K]{consumeFunc: consumeFunc}
 }

exporter/exporterhelper/internal/queue_sender.go

@@ -20,7 +20,7 @@ import (
 
 type QueueSender struct {
 	queue   queuebatch.Queue[request.Request]
-	batcher component.Component
+	batcher batcher.Batcher[request.Request]
 }
 
 func NewQueueSender(