test: mark test-dgram-multicast-ssmv6-multi-process flaky

refs: #32946

Mark this test as flaky on linux
Ive used sequential.status as a template for this file

PR-URL: #33498
Refs: #32946
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/internet/internet.status

@@ -0,0 +1,26 @@
+prefix internet
+
+# To mark a test as flaky, list the test name in the appropriate section
+# below, without ".js", followed by ": PASS,FLAKY". Example:
+# sample-test                       : PASS,FLAKY
+
+[true] # This section applies to all platforms
+
+
+[$system==win32]
+
+[$system==linux]
+# https://github.com/nodejs/node/issues/32946
+test-dgram-multicast-ssmv6-multi-process: PASS, FLAKY
+
+[$system==macos]
+
+[$system==solaris] # Also applies to SmartOS
+
+[$system==freebsd]
+
+[$system==aix]
+
+[$system==ibmi]
+
+[$arch==arm]