test(support): add deleteUserPfx helper to remove user certificate

Add deleteUserPfx() to playwright/support/nc-provisioning.ts to send
DELETE /ocs/v2.php/apps/libresign/api/v1/account/pfx authenticated
as the target user. This ensures tests that require the certificate
creation flow always start from a clean state.

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

playwright/support/nc-provisioning.ts

@@ -143,6 +143,19 @@ type OpenSslCertNames = {
 	L?: string
 }
 
+/**
+ * Deletes the PFX certificate of a user so the next signing attempt
+ * starts without an existing certificate.
+ * Equivalent to: DELETE /ocs/v2.php/apps/libresign/api/v1/account/pfx
+ */
+export async function deleteUserPfx(
+	request: APIRequestContext,
+	userId: string,
+	password: string,
+): Promise<void> {
+	await ocsRequest(request, 'DELETE', '/apps/libresign/api/v1/account/pfx', userId, password)
+}
+
 /**
  * Configures the OpenSSL certificate engine.
  * Equivalent to: `occ libresign:configure:openssl --cn=... --c=... ...`