[chore][pkg/stanza] use test/template for operator format templating (

open-telemetry#36388)

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Ex. Adding a feature - Explain what this achieves.-->
#### Description

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#### Link to tracking issue
Fixes open-telemetry#36050

Signed-off-by: odubajDT <[email protected]>

pkg/stanza/operator/output/file/config.go

@@ -5,7 +5,7 @@ package file // import "github.com/open-telemetry/opentelemetry-collector-contri
 
 import (
 	"fmt"
-	"html/template"
+	"text/template"
 
 	"go.opentelemetry.io/collector/component"
 

pkg/stanza/operator/output/file/output.go

@@ -6,9 +6,9 @@ package file // import "github.com/open-telemetry/opentelemetry-collector-contri
 import (
 	"context"
 	"encoding/json"
-	"html/template"
 	"os"
 	"sync"
+	"text/template"
 
 	"go.uber.org/zap"