[chore] Fix collect-solr integration tests (#5835)

Ignore values of the following metrics:
- gauge.solr.core_max_docs
- gauge.solr.core_num_docs
- counter.solr.update_handler_requests

They are just added to the list of pmetrictest.IgnoreMetricValues arguments. The list is also sorted

Author: dmitryax

tests/receivers/smartagent/collectd-solr/collectd_solr_test.go

@@ -29,19 +29,22 @@ func TestCollectdSolrReceiverProvidesAllMetrics(t *testing.T) {
 		testutils.WithCompareMetricsOptions(
 			pmetrictest.IgnoreTimestamp(),
 			pmetrictest.IgnoreMetricValues(
-				"gauge.solr.core_usablespace",
-				"counter.solr.node_collections_requests",
-				"counter.solr.node_metrics_requests",
 				"counter.solr.http_2xx_responses",
 				"counter.solr.http_requests",
+				"counter.solr.node_collections_requests",
+				"counter.solr.node_metrics_requests",
+				"counter.solr.update_handler_requests",
+				"gauge.solr.core_index_size",
+				"gauge.solr.core_max_docs",
+				"gauge.solr.core_num_docs",
+				"gauge.solr.core_totalspace",
+				"gauge.solr.core_usablespace",
 				"gauge.solr.jetty_request_latency",
 				"gauge.solr.jvm_heap_usage",
-				"gauge.solr.jvm_total_memory_used",
 				"gauge.solr.jvm_memory_pools_Metaspace_usage",
-				"gauge.solr.searcher_warmup",
-				"gauge.solr.core_totalspace",
-				"gauge.solr.core_index_size",
+				"gauge.solr.jvm_total_memory_used",
 				"gauge.solr.search_query_response",
+				"gauge.solr.searcher_warmup",
 				"gauge.solr.update_request_handler_response",
 			),
 			pmetrictest.IgnoreResourceAttributeValue("node"),