[chore] [exporter/datadog] add config value for datadog components (#…

…36557)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
adds config value `logs_config.pipelines` to maintain compatibility with
upstream Datadog agent components

<!-- Issue number (e.g. #1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Relates to DataDog/datadog-agent#31190

<!--Describe what testing was performed and which tests were added.-->
#### Testing
existing pipeliens
<!--Describe the documentation added.-->
#### Documentation
none, no change to user or api
<!--Please delete paragraphs that you did not use before submitting.-->

exporter/datadogexporter/agent_components.go

@@ -4,6 +4,7 @@
 package datadogexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter"
 
 import (
+	"runtime"
 	"strings"
 
 	coreconfig "github.com/DataDog/datadog-agent/comp/core/config"
@@ -46,6 +47,8 @@ func newConfigComponent(set component.TelemetrySettings, cfg *Config) coreconfig
 	pkgconfig.Set("logs_config.stop_grace_period", 30, pkgconfigmodel.SourceDefault)
 	pkgconfig.Set("logs_config.use_v2_api", true, pkgconfigmodel.SourceDefault)
 	pkgconfig.SetKnown("logs_config.dev_mode_no_ssl")
-
+	// add logs config pipelines config value, see https://github.com/DataDog/datadog-agent/pull/31190
+	logsPipelines := min(4, runtime.GOMAXPROCS(0))
+	pkgconfig.Set("logs_config.pipelines", logsPipelines, pkgconfigmodel.SourceDefault)
 	return pkgconfig
 }