CAMEL-23195 Implement camel-pulsar SubscriptionMode configuration

[klevy-toast]

Description

Implements subscription modes in camel-pulsar consumers, allowing the user to specify a non-durable subscription. Defaults to durable, which matches the existing behavior.

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[gnodet]

LGTM. Clean implementation following the existing patterns for SubscriptionType and SubscriptionInitialPosition. The SubscriptionMode enum properly wraps the Pulsar client enum, the @UriParam annotation is correct with appropriate defaults, and the single-line wiring in CommonCreationStrategyImpl is clean. Test coverage is good.

[github-actions]

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