Add tab-completion for newly added SUBSCRIPTION options.

Commits c3afe8c and 4826759 added new subscription options
"password_required" and "run_as_owner". This patch adds tab-completion
for these newly added options.

Author: Peter Smith
Discussion: https://postgr.es/m/CAHut+Pu=pnJf=SS1583pknSQ3CbOqLCkWcJCQYt6zxTagHEdmw@mail.gmail.com

Author: Amit Kapila

src/bin/psql/tab-complete.c

@@ -1925,7 +1925,8 @@ psql_completion(const char *text, int start, int end)
 		COMPLETE_WITH("(", "PUBLICATION");
 	/* ALTER SUBSCRIPTION <name> SET ( */
 	else if (HeadMatches("ALTER", "SUBSCRIPTION", MatchAny) && TailMatches("SET", "("))
-		COMPLETE_WITH("binary", "disable_on_error", "origin", "slot_name",
+		COMPLETE_WITH("binary", "disable_on_error", "origin",
+					  "password_required", "run_as_owner", "slot_name",
 					  "streaming", "synchronous_commit");
 	/* ALTER SUBSCRIPTION <name> SKIP ( */
 	else if (HeadMatches("ALTER", "SUBSCRIPTION", MatchAny) && TailMatches("SKIP", "("))
@@ -3268,7 +3269,8 @@ psql_completion(const char *text, int start, int end)
 	/* Complete "CREATE SUBSCRIPTION <name> ...  WITH ( <opt>" */
 	else if (HeadMatches("CREATE", "SUBSCRIPTION") && TailMatches("WITH", "("))
 		COMPLETE_WITH("binary", "connect", "copy_data", "create_slot",
-					  "disable_on_error", "enabled", "origin", "slot_name",
+					  "disable_on_error", "enabled", "origin",
+					  "password_required", "run_as_owner", "slot_name",
 					  "streaming", "synchronous_commit", "two_phase");
 
 /* CREATE TRIGGER --- is allowed inside CREATE SCHEMA, so use TailMatches */