[InstallAPI][Test] Add test for invalid verification mode (llvm#87602)

Author: cyndyishida

clang/test/InstallAPI/driver-invalid-options.test

@@ -7,3 +7,9 @@
 // RUN: not clang-installapi -target x86_64-apple-ios-simulator  %s -o tmp.tbd 2> %t 
 // RUN: FileCheck --check-prefix INVALID_INSTALL_NAME -input-file %t %s
 // INVALID_INSTALL_NAME: error: no install name specified: add -install_name <path>
+
+/// Check invalid verification mode.
+// RUN: not clang-installapi -install_name Foo -target arm64-apple-ios13 \
+// RUN: --verify-mode=Invalid -o tmp.tbd 2> %t
+// RUN: FileCheck --check-prefix INVALID_VERIFY_MODE -input-file %t %s 
+// INVALID_VERIFY_MODE: error: invalid value 'Invalid' in '--verify-mode=Invalid'