test, doc: skip SEA tests on PowerPC

Author: joyeecheung

doc/api/single-executable-applications.md

@@ -283,7 +283,7 @@ platforms:
 * Windows
 * macOS
 * Linux (all distributions [supported by Node.js][] except Alpine and all
-  architectures [supported by Node.js][] except s390x)
+  architectures [supported by Node.js][] except s390x and PowerPC)
 
 This is due to a lack of better tools to generate single-executables that can be
 used to test this feature on other platforms.

test/sequential/sequential.status

@@ -46,3 +46,11 @@ test-watch-mode-inspect: PASS, FLAKY
 [$arch==s390x]
 # https://github.com/nodejs/node/issues/41286
 test-performance-eventloopdelay: PASS, FLAKY
+
+[$arch==ppc]
+# https://github.com/nodejs/node/issues/50740
+test-single-executable-application-empty: SKIP
+test-single-executable-application-snapshot-and-code-cache: SKIP
+test-single-executable-application-snapshot: SKIP
+test-single-executable-application-use-code-cache: SKIP
+test-single-executable-application: SKIP