CAMEL-21432: camel-core - Prevent 0 as cache size for multicast EIP (4.8)

[essobedo]

Fix for https://issues.apache.org/jira/browse/CAMEL-21432 (v 4.8)

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]

🌟 Thank you for your contribution to the Apache Camel project! 🌟

🤖 CI automation will test this PR automatically.

🐫 Apache Camel Committers, please review the following items:

• First-time contributors require MANUAL approval for the GitHub Actions to run

• You can use the command /component-test (camel-)component-name1 (camel-)component-name2.. to request a test from the test bot.

• You can label PRs using build-all, build-dependents, skip-tests and test-dependents to fine-tune the checks executed by this PR.

• Build and test logs are available in the Summary page. Only Apache Camel committers have access to the summary.

• ⚠️ Be careful when sharing logs. Review their contents before sharing them publicly.