[bug] inherit_metadata would be written in lock file if the file is not pdm.lock even strategy config is true

[monchin]

• I have searched the issue tracker and believe that this is not a duplicate.

Make sure you run commands with -v flag before pasting the output.

Steps to reproduce

1. Init a pdm project with pyproject.toml

[project]
name = "pdm_test"
version = "0.1.0"
description = "test"
authors = [
    {name = "mon", email = "fake@email.com"},
]
dependencies = [
    "numpy>=2.0.0"
]
requires-python = "==3.10.*"
readme = "README.md"
license = {text = "MIT"}

[tool.pdm]
distribution = false

2. In this project, run pdm config strategy.inherit_metadata false, and ensure with pdm config strategy.inherit_metadata
3. Run pdm lock -L pdm.test.lock

Actual behavior

pdm.test.lock's strategy would be strategy = ["inherit_metadata"]

Expected behavior

pdm.test.lock's strategy should be strategy = []

Environment Information

pdm 2.19.3

I found that in this line, it actually would not be run if we set -L pdm.test.lock, so maybe it should be run regardless of if self._lockfile is None?