Enable dynamic port allocation for Prometheus and management server during integration tests

[rahul-chekuri]

• Renamed EmbeddedPrometheusBootstrapConfiguration as TestPrometheusConfiguration and now TestPrometheusConfiguration dynamically allocate and register Prometheus container ports without using hardcoded ports.

• Removed dependency on predefined server.port and management.server.port values for integration tests.

• Management server port is dynamically obtained during runtime and exposed for Prometheus to scrape metrics.

• Prometheus container’s mapped port is dynamically registered into the environment (embedded.prometheus.port) at runtime.

• Fixed ManagementTest to use the dynamically registered Prometheus port (embedded.prometheus.port).

• Added logic in BaseIntegrationTest to update dynamicEndpoint to PrometheusRemoteService

[spinnakerbot]

The following commits need their title changed:

• 2916175910a82450f02bfcb66198f09d1432f7c3: Replace hardcoded ports with random ports logic.

• 9457ba86d382cc673564cc4ae1f1a29364ce6642: Replace hardcoded ports with random ports logic.

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