Revert "chore(deps): bump @ibm-cloud/openapi-ruleset from 1.14.2 to 1.18.2"

[soartec-lab]

Reverts #1494

because the following error occurs:

Error:

Error: generated/default/any-of/model/getItemsParams.ts(14,1): error TS1131: Property or signature expected.
Error: generated/default/any-of/model/getItemsParams.ts(17,1): error TS1128: Declaration or statement expected.

Generated

Generated tests/generated/default/any-of/model/getItemsParams.ts:

/**
 * Generated by orval v6.31.0 🍺
 * Do not edit manually.
 * AnyOf Schema
 * OpenAPI spec version: 1.0.0
 */
import type { GetItemsTest } from './getItemsTest';
import { A } from './a';

export type GetItemsParams = {
test?: typeof GetItemsTest[keyof typeof GetItemsTest] 

// eslint-disable-next-line @typescript-eslint/no-redeclare
export const GetItemsTest = {...A,  B: 'B',
  C: 'C',
} as const;
};