new python project: only display supported versions (#9844)

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Addresses #9365. Filters the New Python Project interpreters to those
with supported versions.

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#### New Features

- N/A

#### Bug Fixes

- Don't show unsupported versions in the New Python Project flow #9365


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@:new-folder-flow @:web @:rhel-web

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See reprex in the original issue.

Author: austin3dickey

src/vs/workbench/browser/positronNewFolderFlow/newFolderFlowState.ts

@@ -970,7 +970,8 @@ export class NewFolderFlowStateManager
 		// Once the runtime startup is complete, we can return the filtered list of interpreters.
 		const langId = this._getLangId();
 		let runtimesForLang = this._services.languageRuntimeService.registeredRuntimes
-			.filter(runtime => runtime.languageId === langId);
+			.filter(runtime => runtime.languageId === langId)
+			.filter(runtime => runtime.extraRuntimeData?.supported ?? true);
 
 		// If we're creating a new Python environment, only return Global runtimes.
 		if (langId === LanguageIds.Python