Add ping health contributor

[TimHess]

Description

Adds a ping contributor

Resolves #1439

Quality checklist

• Your code complies with our Coding Style.
• You've updated unit and/or integration tests for your change, where applicable.
• You've updated documentation for your change, where applicable.
  If your change affects other repositories, such as Documentation, Samples and/or MainSite, add linked PRs here.
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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[bart-vmware]

LGTM, aside from sealing internal type.

[bart-vmware]

Suggested change

	internal class PingContributorOptions
	internal sealed class PingContributorOptions

[bart-vmware]

The documentation at https://github.com/SteeltoeOSS/Documentation/blob/v4/api/v4/management/health.md needs to be adapted for this and earlier changes.

• Default of ShowDetails
  
• Include the ping contributor in the list of contributors that are enabled by default
  
• Include the ping actuator in the sample output
  

Please check off the following entry in the PR description, providing a link to a documentation PR.