updates to lifetimes service and CacheHandler install

[runspired]

• Improve documentation for LifetimesService, resolves [Store] Documentation should tell something about store lifetimes #8510
• Fix for CacheHandler not checking first for store before assuming request originated from the store reported in [Store] Documentation should tell something about store lifetimes #8510
• Reconfigure how CacheHandler is setup to ensure it can be configured correctly for service-injected RequestManager approach. (resolves [Store] Adding requestManager from a service can give Cache errors #8508)
• Update documentation examples for import { CacheHandler } from '@ember-data/store';
• allow body on request (resolves [RequestManager] 'body' should be a valid key in the request #8507)
• enable any op per RFC
• only intercept legacy ops missing a url, not all ops