CAMEL-21432: camel-core - Prevent 0 as cache size for multicast EIP

[essobedo]

Fix for https://issues.apache.org/jira/browse/CAMEL-21432

Motivation

The splitter and multicast EIPs set the cache size to 0 by default which causes endless evictions

Modifications:

1. Prevent to set 0 as cache size at the cache level
2. Use the value of CamelContextHelper.getMaximumCachePoolSize as the default cache size for the splitter and multicast EIPs

[github-actions]

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