test(sample): update sample application images and configs

[andrewazores]

• test(sample): update sample application image
• test(sample): set up Agent sample application with new image and TLS config

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See https://github.com/cryostatio/test-applications/issues/1 See https://github.com/cryostatio/test-applications/issues/7 Related to https://github.com/cryostatio/cryostat-agent/issues/139

Description of the change:

This change adds allows the users to provide...

Motivation for the change:

This change is helpful because users may want to...

How to manually test:

1. Insert steps here...
2. ...