fix(flare): rephrase fxutil comment to pass lint_components, update comp/README.md

Author: louis-cqrl

comp/README.md

@@ -144,7 +144,7 @@ Package diagnose provides the diagnose suite for the agent.
 
 *Datadog Team*: agent-configuration
 
-Package flare implements a component to generate flares from the agent.
+Package flare defines the flare component interface and its parameters.
 
 ### [comp/core/fxinstrumentation](https://pkg.go.dev/github.com/DataDog/datadog-agent/comp/core/fxinstrumentation)
 

comp/core/flare/impl/impl.go

@@ -75,7 +75,7 @@ type flareImpl struct {
 }
 
 // filterNilProviders removes nil entries from the providers slice.
-// fxutil.GetAndFilterGroup cannot be used directly here as impl must not import fxutil.
+// GetAndFilterGroup from the fx utility package cannot be used here as impl packages must not import it.
 func filterNilProviders(providers []*flaretypes.FlareFiller) []*flaretypes.FlareFiller {
 	result := make([]*flaretypes.FlareFiller, 0, len(providers))
 	for _, p := range providers {