Port custom changes from old fork of python language server#621

OlegWock wants to merge 3 commits intopython-lsp:developpython-lsp/python-lsp-server:developfrom

deepnote:oleh/nb-3182-update-python-language-server-not-working-in-python-310deepnote/python-lsp-server:oleh/nb-3182-update-python-language-server-not-working-in-python-310Copy head branch name to clipboard