SecretEnv not working in Template

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Pre-bug-report checklist

1. This bug can be reproduced using pure Argo YAML

• Yes 👉 Please report a bug to the Argo Workflows GitHub 👈
• No

If yes, it is more likely to be an Argo bug unrelated to Hera. Please double check before submitting an issue to Hera.

2. This bug occurs in Hera when...

• exporting to YAML
• submitting to Argo
• running on Argo with the Hera runner
• other:

Bug report

Describe the bug
When using SecretEnv in a Template, it is not expanded and the resulting entry in env only contains the name.

To Reproduce
Full Hera code to reproduce the bug:

from hera.workflows import (
    Container,
    Env,
    SecretEnv,
    WorkflowTemplate,
)
from hera.workflows.models import Template

whalesay = Container(
    image="docker/whalesay:latest",
    command=["cowsay"],
    env=[
        Env(name="test", value="1"),
        SecretEnv(name="s1", secret_key="s1", secret_name="abc"),
    ],
)
templates = [Template(name="test", container=whalesay)]
wt = WorkflowTemplate(name="test", templates=templates)
print(wt.templates[0].container.env)

Results:

[EnvVar(name='test', value='1', value_from=None), EnvVar(name='s1', value=None, value_from=None)]

Expected behavior
SecretEnv should be expanded into EnvVar that it's value_from property is populated.

Environment

• Hera Version: 5.15.1
• Python Version: 3.10.13
• Argo Version: 3.5.6