[kbnArchiver] fix save to non-existent file (#101974)

Co-authored-by: spalger <spalger@users.noreply.github.com>

packages/kbn-test/src/kbn_client/kbn_client_import_export.ts

@@ -48,7 +48,12 @@ export class KbnClientImportExport {
  path = `${path}.json`;
  }
 
- const absolutePath = Path.resolve(this.baseDir, path);
+ return Path.resolve(this.baseDir, path);
+ }
+
+ private resolveAndValidatePath(path: string) {
+ const absolutePath = this.resolvePath(path);
+
  if (!existsSync(absolutePath)) {
  throw new Error(
  `unable to resolve path [${path}] to import/export, resolved relative to [${this.baseDir}]`
@@ -59,7 +64,7 @@ export class KbnClientImportExport {
  }
 
  async load(path: string, options?: { space?: string }) {
- const src = this.resolvePath(path);
+ const src = this.resolveAndValidatePath(path);
  this.log.debug('resolved import for', path, 'to', src);
 
  const objects = await parseArchive(src);
@@ -94,7 +99,7 @@ export class KbnClientImportExport {
  }
 
  async unload(path: string, options?: { space?: string }) {
- const src = this.resolvePath(path);
+ const src = this.resolveAndValidatePath(path);
  this.log.debug('unloading docs from archive at', src);
 
  const objects = await parseArchive(src);
@@ -143,6 +148,7 @@ export class KbnClientImportExport {
  })
  .join('\n\n');
 
+ await Fs.mkdir(Path.dirname(dest), { recursive: true });
  await Fs.writeFile(dest, fileContents, 'utf-8');
 
  this.log.success('Exported', objects.length, 'saved objects to', dest);