autoconf: use include directives instead of recursing down test data

We drop /multiple/ seconds off the generation, a dozen off a clean
rebuild, 185 files, and trivialise the distribution,
which can now be trivially generated via the provided snippets

Dist diff:
  -zfs-2.1.99/tests/zfs-tests/tests/functional/pam/utilities.kshlib
  +zfs-2.1.99/tests/zfs-tests/tests/functional/pam/utilities.kshlib.in

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13316

tests/zfs-tests/tests/functional/inheritance/Makefile.am

@@ -1,57 +0,0 @@
-pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/inheritance
-dist_pkgdata_SCRIPTS = \
-	cleanup.ksh \
-	inherit_001_pos.ksh
-
-dist_pkgdata_DATA = \
-	README.config \
-	README.state \
-	inherit.kshlib \
-	config001.cfg \
-	config002.cfg \
-	config003.cfg \
-	config004.cfg \
-	config005.cfg \
-	config006.cfg \
-	config007.cfg \
-	config008.cfg \
-	config009.cfg \
-	config010.cfg \
-	config011.cfg \
-	config012.cfg \
-	config013.cfg \
-	config014.cfg \
-	config015.cfg \
-	config016.cfg \
-	config017.cfg \
-	config018.cfg \
-	config019.cfg \
-	config020.cfg \
-	config021.cfg \
-	config022.cfg \
-	config023.cfg \
-	config024.cfg \
-	state001.cfg \
-	state002.cfg \
-	state003.cfg \
-	state004.cfg \
-	state005.cfg \
-	state006.cfg \
-	state007.cfg \
-	state008.cfg \
-	state009.cfg \
-	state010.cfg \
-	state011.cfg \
-	state012.cfg \
-	state013.cfg \
-	state014.cfg \
-	state015.cfg \
-	state016.cfg \
-	state017.cfg \
-	state018.cfg \
-	state019.cfg \
-	state020.cfg \
-	state021.cfg \
-	state022.cfg \
-	state023.cfg \
-	state024.cfg