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/perf/Makefile.am

@@ -1,9 +0,0 @@
-pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/perf
-dist_pkgdata_DATA = \
-	nfs-sample.cfg \
-	perf.shlib
-
-SUBDIRS = \
-	fio \
-	regression \
-	scripts

tests/zfs-tests/tests/perf/fio/Makefile.am

@@ -1,10 +0,0 @@
-pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/perf/fio
-dist_pkgdata_DATA = \
-	mkfiles.fio \
-	random_reads.fio \
-	random_readwrite.fio \
-	random_readwrite_fixed.fio \
-	random_writes.fio \
-	sequential_reads.fio \
-	sequential_writes.fio \
-	sequential_readwrite.fio

tests/zfs-tests/tests/perf/regression/Makefile.am

@@ -1,13 +0,0 @@
-pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/perf/regression
-dist_pkgdata_SCRIPTS = \
-	random_reads.ksh \
-	random_readwrite.ksh \
-	random_readwrite_fixed.ksh \
-	random_writes.ksh \
-	random_writes_zil.ksh \
-	sequential_reads_arc_cached_clone.ksh \
-	sequential_reads_arc_cached.ksh \
-	sequential_reads_dbuf_cached.ksh \
-	sequential_reads.ksh \
-	sequential_writes.ksh \
-	setup.ksh

tests/zfs-tests/tests/perf/scripts/Makefile.am

@@ -1,2 +0,0 @@
-pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/perf/scripts
-dist_pkgdata_SCRIPTS = prefetch_io.sh