[Security Solution] Remove remaining usage of rule_schema_legacy types (

elastic#188079)

## Summary

Leftover work from elastic#186615

- Removes remaining usage of `rule_schema_legacy` types. In this PR,
simply inlines the last io-ts types used, to be able to get rid of the
legacy folder.
- The remaining files that need to be migrated to using Zod schema types
are:
-
`x-pack/plugins/security_solution/common/api/detection_engine/rule_exceptions/find_exception_references/find_exception_references_route.ts`
- `x-pack/plugins/security_solution/common/api/timeline/model/api.ts`

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

---------

Co-authored-by: Georgii Gorbachev <[email protected]>

x-pack/plugins/security_solution/common/api/detection_engine/rule_exceptions/find_exception_references/find_exception_references_route.ts

@@ -12,10 +12,17 @@ import {
   list_id,
   DefaultNamespaceArray,
 } from '@kbn/securitysolution-io-ts-list-types';
-import { NonEmptyStringArray } from '@kbn/securitysolution-io-ts-types';
+import { NonEmptyStringArray, NonEmptyString, UUID } from '@kbn/securitysolution-io-ts-types';
+
 // TODO https://github.com/elastic/security-team/issues/7491
-// eslint-disable-next-line no-restricted-imports
-import { RuleName, RuleObjectId, RuleSignatureId } from '../../model/rule_schema_legacy';
+type RuleObjectId = t.TypeOf<typeof RuleObjectId>;
+const RuleObjectId = UUID;
+
+type RuleSignatureId = t.TypeOf<typeof RuleSignatureId>;
+const RuleSignatureId = t.string;
+
+type RuleName = t.TypeOf<typeof RuleName>;
+const RuleName = NonEmptyString;
 
 // If ids and list_ids are undefined, route will fetch all lists matching the
 // specified namespace type

x-pack/plugins/security_solution/common/api/timeline/model/api.ts

@@ -15,12 +15,31 @@ import { Direction } from '../../../search_strategy';
 import type { PinnedEvent } from '../pinned_events/pinned_events_route';
 import { PinnedEventRuntimeType } from '../pinned_events/pinned_events_route';
 // TODO https://github.com/elastic/security-team/issues/7491
-// eslint-disable-next-line no-restricted-imports
-import {
-  SavedObjectResolveAliasPurpose,
-  SavedObjectResolveAliasTargetId,
-  SavedObjectResolveOutcome,
-} from '../../detection_engine/model/rule_schema_legacy';
+
+/**
+ * Outcome is a property of the saved object resolve api
+ * will tell us info about the rule after 8.0 migrations
+ */
+export type SavedObjectResolveOutcome = runtimeTypes.TypeOf<typeof SavedObjectResolveOutcome>;
+export const SavedObjectResolveOutcome = runtimeTypes.union([
+  runtimeTypes.literal('exactMatch'),
+  runtimeTypes.literal('aliasMatch'),
+  runtimeTypes.literal('conflict'),
+]);
+
+export type SavedObjectResolveAliasTargetId = runtimeTypes.TypeOf<
+  typeof SavedObjectResolveAliasTargetId
+>;
+export const SavedObjectResolveAliasTargetId = runtimeTypes.string;
+
+export type SavedObjectResolveAliasPurpose = runtimeTypes.TypeOf<
+  typeof SavedObjectResolveAliasPurpose
+>;
+export const SavedObjectResolveAliasPurpose = runtimeTypes.union([
+  runtimeTypes.literal('savedObjectConversion'),
+  runtimeTypes.literal('savedObjectImport'),
+]);
+
 import { ErrorSchema } from './error_schema';
 
 export const BareNoteSchema = runtimeTypes.intersection([