Change default of interpreter path setting from `"python"` to `"default"/"auto"`

[karrtikr]

#20457 (comment)

This enables users to select "python" as an interpreter similar to how they can select "python3" or the like.

• Change default of python.defaultInterpreterPath setting.
• Change all the places in the extension that assumes default is "python". For eg. check these files

  • vscode-python/src/client/common/interpreterPathService.ts

    Lines 81 to 97 in ad0286c

    	!workspaceFolderSetting?.value || workspaceFolderSetting?.value === 'python'
    	? defaultInterpreterPath.workspaceFolderValue
    	: workspaceFolderSetting.value,
    	workspaceValue:
    	!workspaceSetting?.value || workspaceSetting?.value === 'python'
    	? defaultInterpreterPath.workspaceValue
    	: workspaceSetting.value,
    	};
    	}
    	public get(resource: Resource): string {
    	const settings = this.inspect(resource);
    	const value =
    	settings.workspaceFolderValue ||
    	settings.workspaceValue ||
    	settings.globalValue ||
    	(isTestExecution() ? CI_PYTHON_PATH : 'python');

  • vscode-python/src/client/common/configSettings.ts

    Line 584 in 29a72b4

    (this.pythonPath.length === 0 || this.pythonPath === 'python') &&

  • vscode-python/src/client/common/process/pythonExecutionFactory.ts

    Lines 54 to 58 in bddcb20

    	if (!pythonPath || pythonPath === 'python') {
    	// If python path wasn't passed in, we need to auto select it and then read it
    	// from the configuration.
    	const interpreterPath = this.interpreterPathExpHelper.get(options.resource);
    	if (!interpreterPath || interpreterPath === 'python') {

  • vscode-python/src/client/common/constants.ts

    Line 94 in 8470555

    export const DEFAULT_INTERPRETER_SETTING = 'python';

  • ... and more
• Make sure any external API consumers relying on this fact are notified.

[karrtikr]

VSCode uses "auto": #20457 (comment)