[BUG] Fail to install dev branch

[serena-ruan]

Describe the bug
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Hey friends, it seems the installation process https://github.com/mlflow-automation/mlflow/actions/runs/8498480507/job/23280874139#step:8:82 fails due to package conflicts. The error message is a little bit weird, but could you fix it in MLflow or in your repo?

How To Reproduce the bug
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1.pip install git+https://github.com/microsoft/promptflow#subdirectory=src/promptflow

Expected behavior
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Running Information(please complete the following information):

• Promptflow Package Version using pf -v: [e.g. 0.0.102309906]
• Operating System: [e.g. Ubuntu 20.04, Windows 11]
• Python Version using python --version: [e.g. python==3.10.12]

Additional context
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[serena-ruan]

cc @brynn-code

[brynn-code]

Hey @serena-ruan, we are working on package splitting these days, we need some changes to ensure mlflow installed promptflow dev version correctly, I'll create the PR asap, thanks for the reaching out! ❤️❤️

[brynn-code]

Also there is another issue, we use from promptflow import load_flow in mlflow, this will start print warning like please use from promptflow.client import load_flow balabala since promptflow 1.7.0, we will update the code afterwards, that method will not be removed, only warning messages there.