chore: remove redundant config Validate call (open-telemetry#35199)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
Configuration validation is done during collector's startup, making it
redundant when being called inside component's logic. This PR removes
the Validate call done during exporter's constructor.

**Link to tracking Issue:** <Issue number if applicable>
open-telemetry#33498

**Testing:** <Describe what testing was performed and which tests were
added.> Same coverage after removed lines: `coverage: 77.8% of
statements`

`TestFactory_CreateLogsExporter_Fail` and
`TestFactory_CreateTracesExporter_Fail` functions are covered by the
already available `config_test.go` cases.

**Documentation:** <Describe the documentation added.>

exporter/elasticsearchexporter/config_test.go

@@ -395,8 +395,7 @@ func TestConfig_Validate(t *testing.T) {
 
 	for name, tt := range tests {
 		t.Run(name, func(t *testing.T) {
-			err := tt.config.Validate()
-			assert.EqualError(t, err, tt.err)
+			assert.EqualError(t, component.ValidateConfig(tt.config), tt.err)
 		})
 	}
 }
@@ -405,13 +404,13 @@ func TestConfig_Validate_Environment(t *testing.T) {
 	t.Run("valid", func(t *testing.T) {
 		t.Setenv("ELASTICSEARCH_URL", "http://test:9200")
 		config := withDefaultConfig()
-		err := config.Validate()
+		err := component.ValidateConfig(config)
 		require.NoError(t, err)
 	})
 	t.Run("invalid", func(t *testing.T) {
 		t.Setenv("ELASTICSEARCH_URL", "http://valid:9200, *:!")
 		config := withDefaultConfig()
-		err := config.Validate()
+		err := component.ValidateConfig(config)
 		assert.EqualError(t, err, `invalid endpoint "*:!": parse "*:!": first path segment in URL cannot contain colon`)
 	})
 }

exporter/elasticsearchexporter/exporter.go

@@ -42,11 +42,7 @@ func newExporter(
 	set exporter.Settings,
 	index string,
 	dynamicIndex bool,
-) (*elasticsearchExporter, error) {
-	if err := cfg.Validate(); err != nil {
-		return nil, err
-	}
-
+) *elasticsearchExporter {
 	model := &encodeModel{
 		dedot: cfg.Mapping.Dedot,
 		mode:  cfg.MappingMode(),
@@ -72,7 +68,7 @@ func newExporter(
 		model:          model,
 		logstashFormat: cfg.LogstashFormat,
 		otel:           otel,
-	}, nil
+	}
 }
 
 func (e *elasticsearchExporter) Start(ctx context.Context, host component.Host) error {

exporter/elasticsearchexporter/factory.go

@@ -7,7 +7,6 @@ package elasticsearchexporter // import "github.com/open-telemetry/opentelemetry
 
 import (
 	"context"
-	"fmt"
 	"net/http"
 	"time"
 
@@ -113,10 +112,7 @@ func createLogsExporter(
 	}
 	logConfigDeprecationWarnings(cf, set.Logger)
 
-	exporter, err := newExporter(cf, set, index, cf.LogsDynamicIndex.Enabled)
-	if err != nil {
-		return nil, fmt.Errorf("cannot configure Elasticsearch exporter: %w", err)
-	}
+	exporter := newExporter(cf, set, index, cf.LogsDynamicIndex.Enabled)
 
 	return exporterhelper.NewLogsExporter(
 		ctx,
@@ -135,10 +131,8 @@ func createMetricsExporter(
 	cf := cfg.(*Config)
 	logConfigDeprecationWarnings(cf, set.Logger)
 
-	exporter, err := newExporter(cf, set, cf.MetricsIndex, cf.MetricsDynamicIndex.Enabled)
-	if err != nil {
-		return nil, fmt.Errorf("cannot configure Elasticsearch exporter: %w", err)
-	}
+	exporter := newExporter(cf, set, cf.MetricsIndex, cf.MetricsDynamicIndex.Enabled)
+
 	return exporterhelper.NewMetricsExporter(
 		ctx,
 		set,
@@ -150,15 +144,13 @@ func createMetricsExporter(
 
 func createTracesExporter(ctx context.Context,
 	set exporter.Settings,
-	cfg component.Config) (exporter.Traces, error) {
-
+	cfg component.Config,
+) (exporter.Traces, error) {
 	cf := cfg.(*Config)
 	logConfigDeprecationWarnings(cf, set.Logger)
 
-	exporter, err := newExporter(cf, set, cf.TracesIndex, cf.TracesDynamicIndex.Enabled)
-	if err != nil {
-		return nil, fmt.Errorf("cannot configure Elasticsearch exporter: %w", err)
-	}
+	exporter := newExporter(cf, set, cf.TracesIndex, cf.TracesDynamicIndex.Enabled)
+
 	return exporterhelper.NewTracesExporter(
 		ctx,
 		set,

exporter/elasticsearchexporter/factory_test.go

@@ -35,15 +35,6 @@ func TestFactory_CreateLogsExporter(t *testing.T) {
 	require.NoError(t, exporter.Shutdown(context.Background()))
 }
 
-func TestFactory_CreateLogsExporter_Fail(t *testing.T) {
-	factory := NewFactory()
-	cfg := factory.CreateDefaultConfig()
-	params := exportertest.NewNopSettings()
-	_, err := factory.CreateLogsExporter(context.Background(), params, cfg)
-	require.Error(t, err, "expected an error when creating a logs exporter")
-	assert.EqualError(t, err, "cannot configure Elasticsearch exporter: exactly one of [endpoint, endpoints, cloudid] must be specified")
-}
-
 func TestFactory_CreateMetricsExporter(t *testing.T) {
 	factory := NewFactory()
 	cfg := withDefaultConfig(func(cfg *Config) {
@@ -70,15 +61,6 @@ func TestFactory_CreateTracesExporter(t *testing.T) {
 	require.NoError(t, exporter.Shutdown(context.Background()))
 }
 
-func TestFactory_CreateTracesExporter_Fail(t *testing.T) {
-	factory := NewFactory()
-	cfg := factory.CreateDefaultConfig()
-	params := exportertest.NewNopSettings()
-	_, err := factory.CreateTracesExporter(context.Background(), params, cfg)
-	require.Error(t, err, "expected an error when creating a traces exporter")
-	assert.EqualError(t, err, "cannot configure Elasticsearch exporter: exactly one of [endpoint, endpoints, cloudid] must be specified")
-}
-
 func TestFactory_CreateLogsAndTracesExporterWithDeprecatedIndexOption(t *testing.T) {
 	factory := NewFactory()
 	cfg := withDefaultConfig(func(cfg *Config) {