### Description

Introducing a startupProbe onto the airflow services would be useful for slow starting container and most of all it doesn't have side effects.

### Use case/motivation

We have an internal feature where we perform a copy of venv from airflow services to cloud storages which can sometimes take a few minutes. Copying of a venv is a metadata heavy load: https://learn.microsoft.com/en-us/troubleshoot/azure/azure-storage/files-troubleshoot-performance?tabs=linux#cause-2-metadata-or-namespace-heavy-workload.

Introducing a startupProbe onto the airflow services would be useful for slow starting container and most of all it doesn't have side effects.

### Related issues

_No response_

### Are you willing to submit a PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""Tests webserver network policy."""
    def test_off_by_default(self):
        docs = render_chart(
            show_only=["templates/webserver/webserver-networkpolicy.yaml"],
        )
        assert 0 == len(docs)
    def test_defaults(self):
        docs = render_chart(
            values={
                "networkPolicies": {"enabled": True},
                "webserver": {
                    "networkPolicy": {
                        "ingress": {
                            "from": [{"namespaceSelector": {"matchLabels": {"release": "myrelease"}}}]
                        }
                    }
                },
            },
            show_only=["templates/webserver/webserver-networkpolicy.yaml"],
        )
        assert 1 == len(docs)
        assert "NetworkPolicy" == docs[0]["kind"]
        assert [{"namespaceSelector": {"matchLabels": {"release": "myrelease"}}}] == jmespath.search(
            "spec.ingress[0].from", docs[0]
        )
        assert [{"port": 8080}] == jmespath.search("spec.ingress[0].ports", docs[0])
    @pytest.mark.parametrize(
        "ports, expected_ports",
        [