Split biotest into its three logical parts

Some parts of this test rely on unportable behavior, so cannot run in
portable. This way we can run more tests for portable which is helpful
for analysis tools, better coverage, etc.

Author: tb

src/regress/lib/libcrypto/bio/Makefile

@@ -1,6 +1,9 @@
-#	$OpenBSD: Makefile,v 1.3 2022/12/03 09:55:53 tb Exp $
+#	$OpenBSD: Makefile,v 1.4 2022/12/08 17:49:02 tb Exp $
+
+PROGS +=	bio_chain
+PROGS +=	bio_host
+PROGS +=	bio_mem
 
-PROG =		biotest
 LDADD =		-lcrypto
 DPADD =		${LIBCRYPTO}
 WARNINGS =	Yes