[chore][confmap] run make modernize (#14157)

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#### Description

Run the `make modernize` tool.

https://pkg.go.dev/golang.org/x/tools/gopls/internal/analysis/modernize

This is part of the process to enable the
[modernize](#14153)
linter in CI.

There are no changes in the component behaviour.

Signed-off-by: Paulo Dias <[email protected]>

Author: paulojmdias

confmap/internal/decoder.go

@@ -168,7 +168,7 @@ func mapKeyStringToMapKeyTextUnmarshalerHookFunc() mapstructure.DecodeHookFuncTy
 		}
 
 		// Create a map with key value of to's key to bool.
-		fieldNameSet := reflect.MakeMap(reflect.MapOf(to.Key(), reflect.TypeOf(true)))
+		fieldNameSet := reflect.MakeMap(reflect.MapOf(to.Key(), reflect.TypeFor[bool]()))
 		for k := range data.(map[string]any) {
 			// Create a new value of the to's key type.
 			tKey := reflect.New(to.Key())

confmap/xconfmap/config.go

@@ -15,7 +15,7 @@ import (
 
 // As interface types are only used for static typing, a common idiom to find the reflection Type
 // for an interface type Foo is to use a *Foo value.
-var configValidatorType = reflect.TypeOf((*Validator)(nil)).Elem()
+var configValidatorType = reflect.TypeFor[Validator]()
 
 // Validator defines an optional interface for configurations to implement to do validation.
 type Validator interface {