Revert "Fix #98766 - Reloading a dirty saved search editor causes a p…

…hantom tab to appear"

This reverts commit 028241b.
This fixes #99621, but re-introduces #98766
I'm not sure of a way to remove both bugs, it will likely involve large refactorings.

src/vs/workbench/contrib/searchEditor/browser/searchEditorInput.ts

@@ -110,7 +110,7 @@ export class SearchEditorInput extends EditorInput {
 
 		const input = this;
 		const workingCopyAdapter = new class implements IWorkingCopy {
-			readonly resource = input.backingUri ?? input.modelUri;
+			readonly resource = input.modelUri;
 			get name() { return input.getName(); }
 			readonly capabilities = input.isUntitled() ? WorkingCopyCapabilities.Untitled : 0;
 			readonly onDidChangeDirty = input.onDidChangeDirty;

src/vs/workbench/contrib/searchEditor/browser/searchEditorModel.ts

@@ -34,7 +34,7 @@ export class SearchEditorModel {
 		@IModeService private readonly modeService: IModeService) {
 		this.onModelResolved = new Promise<ITextModel>(resolve => this.resolveContents = resolve);
 		this.onModelResolved.then(model => this.cachedContentsModel = model);
-		this.ongoingResolve = backupService.resolve(existingData.backingUri ?? modelUri)
+		this.ongoingResolve = backupService.resolve(modelUri)
 			.then(backup => modelService.getModel(modelUri) ?? (backup ? modelService.createModel(backup.value, modeService.create('search-result'), modelUri) : undefined))
 			.then(model => { if (model) { this.resolveContents(model); } });
 	}