SWATCH-2980: Port export subscriptions to swatch contracts service

The export of subscriptions was implemented as part of SWATCH-2021 and SWATCH-2023 (epic SWATCH-86).

Since the idea is to delete the subscription sync service, we need to also port this functionality to the swatch contracts.

Important changes:
- the Quarkus REST-Client does not support having multiple Content-Type, so I changed the export API to use instead of using application/json and application/csv, just use "application/octet-stream". 
- I had to disable/comment some tests because we need a Postgresql instance with all the migrations (the migration scripts from the monolith and the ones from the swatch-contracts). This needs to be addressed in a separated ticket which is already reported in SWATCH-2820

clients/export-client/export-api-spec.yaml

@@ -39,11 +39,7 @@ paths:
       requestBody:
         required: true
         content:
-          application/json:
-            schema:
-              type: string
-              format: binary
-          application/csv:
+          application/octet-stream:
             schema:
               type: string
               format: binary

src/main/java/org/candlepin/subscriptions/capacity/CapacityIngressConfiguration.java

@@ -21,7 +21,6 @@
 package org.candlepin.subscriptions.capacity;
 
 import org.candlepin.subscriptions.db.RhsmSubscriptionsDataSourceConfiguration;
-import org.candlepin.subscriptions.export.ExportConfiguration;
 import org.candlepin.subscriptions.resteasy.ResteasyConfiguration;
 import org.springframework.boot.autoconfigure.AutoConfigurationExcludeFilter;
 import org.springframework.boot.context.TypeExcludeFilter;
@@ -43,14 +42,11 @@
 @Import({
   ResteasyConfiguration.class,
   RhsmSubscriptionsDataSourceConfiguration.class,
-  ExportConfiguration.class
 })
 @ComponentScan(
     basePackages = {
       "org.candlepin.subscriptions.capacity",
       "org.candlepin.subscriptions.product",
-      "org.candlepin.subscriptions.export",
-      "org.candlepin.subscriptions.subscription.export",
     },
     // Prevent TestConfiguration annotated classes from being picked up by ComponentScan
     excludeFilters = {

src/main/resources/application-capacity-ingress.yaml

@@ -1,15 +1,2 @@
-SUBSCRIPTION_EXPORT_TOPIC: ${clowder.kafka.topics."platform.export.requests".name:platform.export.requests}
-
-
 rhsm-subscriptions:
-  export-service:
-    url: ${clowder.privateEndpoints.export-service-service.url:http://localhost:10000}
-    truststore: ${clowder.privateEndpoints.export-service-service.trust-store-path}
-    truststore-password: ${clowder.privateEndpoints.export-service-service.trust-store-password}
-    truststore-type: ${clowder.privateEndpoints.export-service-service.trust-store-type}
-    psk: ${SWATCH_EXPORT_PSK:placeholder}
   subscription-sync-enabled: ${SUBSCRIPTION_SYNC_ENABLED:true}
-  export:
-    tasks:
-      topic: ${SUBSCRIPTION_EXPORT_TOPIC}
-      kafka-group-id: swatch-subscription-export

src/test/java/org/candlepin/subscriptions/export/BaseDataExporterServiceTest.java

@@ -51,7 +51,7 @@
 import org.candlepin.subscriptions.db.model.Offering;
 import org.candlepin.subscriptions.db.model.ServiceLevel;
 import org.candlepin.subscriptions.db.model.Usage;
-import org.candlepin.subscriptions.json.SubscriptionsExportJson;
+import org.candlepin.subscriptions.json.InstancesExportJson;
 import org.candlepin.subscriptions.rbac.RbacApiException;
 import org.candlepin.subscriptions.rbac.RbacService;
 import org.candlepin.subscriptions.task.TaskQueueProperties;
@@ -193,7 +193,7 @@ protected void verifyNoRequestsWereSentToExportServiceWithUploadData() {
 
   protected void verifyRequestWasSentToExportServiceWithNoDataFound() {
     verifyRequestWasSentToExportServiceWithUploadData(
-        request, toJson(new SubscriptionsExportJson().withData(new ArrayList<>())));
+        request, toJson(new InstancesExportJson().withData(new ArrayList<>())));
   }
 
   protected void updateOffering() {