Due to a memory leak in our DefaultCacheProvider implementation (see #16315), we had to use an LRUCache also for reflection caches, not just for the parsing connection cache as we did already before.

The fix that is backported for #16315 didn't include any settings to override the reflection cache size. This issue here introduces new flags:

• Settings.cacheRecordMappersLRUCacheSize
• Settings.reflectionCacheLRUCacheSize (this won't be further divided into individual flags)