[Logs UI] Access ML via the programmatic plugin API (#68905)

This modifies the routes related to log rate and category analysis to use the new programmatic APIs provided by the `ml` plugin to access the results index and job info. Because that access is facilitated via the request context, the log analysis lib was converted from classes to plain functions.

At the same time the routes have been updated to use the most recent validation and error handling patterns.

x-pack/plugins/infra/kibana.json

@@ -13,6 +13,9 @@
     "alerts",
     "triggers_actions_ui"
   ],
+  "optionalPlugins": [
+    "ml"
+  ],
   "server": true,
   "ui": true,
   "configPath": ["xpack", "infra"]

x-pack/plugins/infra/server/lib/adapters/framework/adapter_types.ts

@@ -4,18 +4,18 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { SearchResponse, GenericParams } from 'elasticsearch';
+import { GenericParams, SearchResponse } from 'elasticsearch';
 import { Lifecycle } from 'hapi';
 import { UsageCollectionSetup } from 'src/plugins/usage_collection/server';
-import { RouteMethod, RouteConfig } from '../../../../../../../src/core/server';
-import { PluginSetupContract as FeaturesPluginSetup } from '../../../../../../plugins/features/server';
-import { SpacesPluginSetup } from '../../../../../../plugins/spaces/server';
+import { RouteConfig, RouteMethod } from '../../../../../../../src/core/server';
+import { HomeServerPluginSetup } from '../../../../../../../src/plugins/home/server';
 import { VisTypeTimeseriesSetup } from '../../../../../../../src/plugins/vis_type_timeseries/server';
 import { APMPluginSetup } from '../../../../../../plugins/apm/server';
-import { HomeServerPluginSetup } from '../../../../../../../src/plugins/home/server';
+import { PluginSetupContract as FeaturesPluginSetup } from '../../../../../../plugins/features/server';
+import { SpacesPluginSetup } from '../../../../../../plugins/spaces/server';
 import { PluginSetupContract as AlertingPluginContract } from '../../../../../alerts/server';
+import { MlPluginSetup } from '../../../../../ml/server';
 
-// NP_TODO: Compose real types from plugins we depend on, no "any"
 export interface InfraServerPluginDeps {
   home: HomeServerPluginSetup;
   spaces: SpacesPluginSetup;
@@ -24,6 +24,7 @@ export interface InfraServerPluginDeps {
   features: FeaturesPluginSetup;
   apm: APMPluginSetup;
   alerts: AlertingPluginContract;
+  ml?: MlPluginSetup;
 }
 
 export interface CallWithRequestParams extends GenericParams {

x-pack/plugins/infra/server/lib/infra_types.ts

@@ -8,7 +8,6 @@ import { InfraSourceConfiguration } from '../../common/graphql/types';
 import { InfraFieldsDomain } from './domains/fields_domain';
 import { InfraLogEntriesDomain } from './domains/log_entries_domain';
 import { InfraMetricsDomain } from './domains/metrics_domain';
-import { LogEntryCategoriesAnalysis, LogEntryRateAnalysis } from './log_analysis';
 import { InfraSnapshot } from './snapshot';
 import { InfraSources } from './sources';
 import { InfraSourceStatus } from './source_status';
@@ -31,8 +30,6 @@ export interface InfraDomainLibs {
 export interface InfraBackendLibs extends InfraDomainLibs {
   configuration: InfraConfig;
   framework: KibanaFramework;
-  logEntryCategoriesAnalysis: LogEntryCategoriesAnalysis;
-  logEntryRateAnalysis: LogEntryRateAnalysis;
   snapshot: InfraSnapshot;
   sources: InfraSources;
   sourceStatus: InfraSourceStatus;