Health in 4.x does not support excluding (or including) health checks by name as 3.x does

[tjquinno]

Environment Details

• Helidon Version: 4.x
• Helidon SE or Helidon MP
• JDK version:
• OS:
• Docker version (if applicable):

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Problem Description

Helidon 3.x supports config settings (or programmatic use of the builder) to exclude or include health checks by name. (Note - the documented config key for 3.x is incorrect; see #8617.)

Helidon 4 does not have this feature and its removal was not intentional.

This issue reflects the need to restore the missing feature and correct the doc's and Javadoc's usage of the incorrect config key.

Steps to reproduce

Use the Helidon 4 MP quickstart example app.

1. Add this dependency to include the built-in health checks:

      <dependency>
            <groupId>io.helidon.health</groupId>
            <artifactId>helidon-health-checks</artifactId>
            <scope>runtime</scope>
        </dependency>

2. Update microprofile-config.properties to include the following. (Specify both config keys to show that neither triggers the "exclude" functionality.)

helidon.health.exclude=deadlock
health.exclude=deadlock

3. Build and run the app.
4. Access http://localhost:8080/health; the deadlock check is still reported.