Update data archives for SO integration tests (elastic#204561)

## Summary

Bumping the data archives to 8.last (8.18 at the moment) so that ES 9.0
finds it compatible.

Resolves elastic#158318.
Resolves elastic#163254.
Resolves elastic#163255.
Resolves elastic#166190.
Resolves elastic#166199.
Resolves elastic#167676.

src/core/server/integration_tests/saved_objects/migrations/group3/actions/actions_test_suite.ts

@@ -770,10 +770,9 @@ export const runActionTestSuite = ({
     });
   });
 
-  // Reindex doesn't return any errors on it's own, so we have to test
+  // Reindex doesn't return any errors on its own, so we have to test
   // together with waitForReindexTask
-  // Failing: See https://github.com/elastic/kibana/issues/166190
-  describe.skip('reindex & waitForReindexTask', () => {
+  describe('reindex & waitForReindexTask', () => {
     it('resolves right when reindex succeeds without reindex script', async () => {
       const res = (await reindex({
         client,
@@ -1444,8 +1443,7 @@ export const runActionTestSuite = ({
     });
   });
 
-  // FLAKY: https://github.com/elastic/kibana/issues/166199
-  describe.skip('waitForPickupUpdatedMappingsTask', () => {
+  describe('waitForPickupUpdatedMappingsTask', () => {
     it('rejects if there are failures', async () => {
       const res = (await pickupUpdatedMappings(
         client,

src/core/server/integration_tests/saved_objects/migrations/group3/incompatible_cluster_routing_allocation.test.ts

@@ -92,8 +92,7 @@ async function updateRoutingAllocations(
   });
 }
 
-// Failing ES promotion: https://github.com/elastic/kibana/issues/158318
-describe.skip('incompatible_cluster_routing_allocation', () => {
+describe('incompatible_cluster_routing_allocation', () => {
   let client: ElasticsearchClient;
   let root: Root;
 

src/core/server/integration_tests/saved_objects/migrations/group3/multiple_es_nodes.test.ts

@@ -96,8 +96,7 @@ function createRoot({ logFileName, hosts }: RootConfig) {
   });
 }
 
-// Failing ES promotion: https://github.com/elastic/kibana/issues/167676
-describe.skip('migration v2', () => {
+describe('migration v2', () => {
   let esServer: TestElasticsearchUtils;
   let root: Root;
   const migratedIndexAlias = `.kibana_${pkg.version}`;

src/core/server/integration_tests/saved_objects/migrations/group3/read_batch_size.test.ts

@@ -19,9 +19,7 @@ import { getFips } from 'crypto';
 
 const logFilePath = join(__dirname, 'read_batch_size.log');
 
-// Failing ES promotion: https://github.com/elastic/kibana/issues/163254
-// Failing ES promotion: https://github.com/elastic/kibana/issues/163255
-describe.skip('migration v2 - read batch size', () => {
+describe('migration v2 - read batch size', () => {
   let esServer: TestElasticsearchUtils;
   let root: Root;
   let logs: string;