Troubleshooting pip version issues in CI (#1504)

* CI failed to run on 23.1 and 23.1.1

* add pyproject.toml

* upgrade pip in slow.yml

* upgrade build-system requires

* troubleshooting pytest problem

* troubleshooting pytest problem

* troubleshooting pytest problem

* troubleshooting pytest problem

* add qlib root path to python sys.path

* add qlib root path to $PYTHONPATH

* add qlib root path to $PYTHONPATH

* add qlib root path to $PYTHONPATH

* modify pytest root;

* remove set env

* change_pytest_command_CI

* change_pytest_command_CI

* fix_ci

* fix_ci

* fix_ci

* fix_ci

* fix_ci

* fix_ci

* fix_ci

* remove_toml

* recover_toml

---------

Co-authored-by: lijinhui <362237642@qq.com>
Co-authored-by: linlang <Lv.Linlang@hotmail.com>

.github/workflows/test_qlib_from_source.yml

@@ -38,10 +38,8 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Update pip to the latest version
-      # pip release version 23.1 on Apr.15 2023, CI failed to run, Please refer to #1495 ofr detailed logs.
-      # The pip version has been temporarily fixed to 23.0
       run: |
-        python -m pip install pip==23.0
+        python -m pip install --upgrade pip
 
     - name: Installing pytorch for macos
       if: ${{ matrix.os == 'macos-11' || matrix.os == 'macos-latest' }}

.github/workflows/test_qlib_from_source_slow.yml

@@ -38,10 +38,8 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Set up Python tools
-      # pip release version 23.1 on Apr.15 2023, CI failed to run, Please refer to #1495 ofr detailed logs.
-      # The pip version has been temporarily fixed to 23.0
       run: |
-        python -m pip install pip==23.0
+        python -m pip install --upgrade pip
         pip install --upgrade cython numpy
         pip install -e .[dev]