test: Adds shared stream instance support for acceptance tests (#3490)

* test: Exposes stream instance management for test infrastructure cleanup

* test: Adds shared stream instance support for acceptance tests

* refactor: consolidate stream connection test files and add connection name parameter

* refactor: consolidate stream connection test cases and improve data source checks

* refactor: consolidate stream connection test files and improve test organization

* fix: create separate stream instance for sample stream connection tests and add sample connection to default stream instance

* test: Support re-using stream instance in streamprocessor tests

* refactor: add ConfigStateChecks and extract pluralConfigStateChecks helper function in stream processor tests to allow plural checks when tests are run in parallel

* docs: add documentation for ProjectIDExecutionWithStreamInstance test helper

* docs: improve comments and rename variables in stream-related test files

* refactor: update pagination comment and improve stream instance check logic

Author: EspenAlbert

internal/service/streamconnection/data_source_stream_connection_test.go

@@ -9,10 +9,10 @@ import (
 
 func TestMigStreamRSStreamConnection_kafkaPlaintext(t *testing.T) {
 	mig.SkipIfVersionBelow(t, "1.16.0") // when reached GA
-	mig.CreateAndRunTest(t, testCaseKafkaPlaintext(t))
+	mig.CreateAndRunTest(t, testCaseKafkaPlaintext(t, "-mig"))
 }
 
 func TestMigStreamRSStreamConnection_cluster(t *testing.T) {
 	mig.SkipIfVersionBelow(t, "1.16.0") // when reached GA
-	mig.CreateAndRunTest(t, testCaseCluster(t))
+	mig.CreateAndRunTest(t, testCaseCluster(t, "-mig"))
 }