CAMEL-23652: Add tests for bean EIP ref with local template beans

[davsclaus]

Summary

• Add test coverage for using bean: ref: "{{beanName}}" to reference local template beans in kamelets and route templates
• Tests verify the scenario reported in CAMEL-23652 where bean EIP ref references a template-scoped bean
• Both tests pass, confirming this works correctly in the current codebase

Tests Added

• KameletTest — "kamelet (definition with local bean via bean ref)": Tests bean: ref: "{{myCounter}}" in a YAML routeTemplate with an AtomicInteger template bean
• KameletLoaderTest — "kamelet with local bean via bean ref": Tests the full kamelet YAML format (apiVersion/kind/spec) with template.beans defining an AtomicInteger with constructor parameter {{start}}, and bean: ref: "{{counter}}" referencing it — matching the exact scenario from the JIRA issue

Test plan

• mvn test -pl dsl/camel-yaml-dsl/camel-yaml-dsl -Dtest="KameletLoaderTest,KameletTest" — all 23 tests pass

Claus Ibsen using Claude Code on behalf of Claus Ibsen

[github-actions]

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[github-actions]

🧪 CI tested the following changed modules:

• dsl/camel-yaml-dsl/camel-yaml-dsl

All tested modules (8 modules)

• Camel :: JBang :: MCP
• Camel :: JBang :: Plugin :: Route Parser
• Camel :: JBang :: Plugin :: TUI
• Camel :: JBang :: Plugin :: Validate
• Camel :: Launcher :: Container
• Camel :: YAML DSL
• Camel :: YAML DSL :: Validator
• Camel :: YAML DSL :: Validator Maven Plugin

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