test: skip more sea tests on Linux ppc64le

Theses tests are failing when compiled with clang. Skip for now to
avoid breaking the CI when we switch over to building with clang.

PR-URL: #59755
Refs: #59561
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: richardlau

test/sequential/sequential.status

@@ -63,6 +63,9 @@ test-single-executable-application-disable-experimental-sea-warning: SKIP
 test-single-executable-application-empty: SKIP
 test-single-executable-application-exec-argv: SKIP
 test-single-executable-application-exec-argv-empty: SKIP
+test-single-executable-application-exec-argv-extension-cli: SKIP
+test-single-executable-application-exec-argv-extension-env: SKIP
+test-single-executable-application-exec-argv-extension-none: SKIP
 test-single-executable-application-inspect-in-sea-flags: SKIP
 test-single-executable-application-inspect: SKIP
 test-single-executable-application-snapshot: SKIP