add header to tables

goofy-client/libs/vorgang-detail/src/lib/vorgang-detail-page/vorgang-detail-area/vorgang-detail-body/antragsteller/antragsteller.component.html

-<table>
+<table aria-label="Antragstellerdaten">
 	<tr>
-		<th>Antragsteller Formularfeld</th>
-		<th>Antragsteller Formulareingabe</th>
+		<th>Formularfeld</th>
+		<th>Formulareingabe</th>
 	</tr>
 	<tr>
 		<td class="key">Anrede</td>

goofy-client/libs/vorgang-detail/src/lib/vorgang-detail-page/vorgang-detail-area/vorgang-detail-body/eingang-header/eingang-header.component.html

-<table>
+<table aria-label="Eingangsdaten">
+	<tr>
+		<th>Formularfeld</th>
+		<th>Formulareingabe</th>
+	</tr>
 	<tr>
 		<td class="key">Erstellungsdatum</td>
 		<td class="value">{{ eingangHeader.createdAt }}</td>

goofy-client/libs/vorgang-detail/src/lib/vorgang-detail-page/vorgang-detail-area/vorgang-detail-body/form-data-table/form-data-table.component.html

-<table aria-label="Antragstellerdaten">
+<table aria-label="Formulardaten">
+	<tr>
+		<th>Formularfeld</th>
+		<th>Formulareingabe</th>
+	</tr>
 	<tr *ngFor="let row of formData | keyvalue: objectToBottom">
 
 		<td colspan="2" *ngIf="isObject(row.value); else keyValueEntry">