Rename reservation tests from *.sh to *.ksh

Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Igor Kozhukhov <igor@dilos.org>
Closes openzfs#8729

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

@@ -2,28 +2,28 @@ pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/reservation
 dist_pkgdata_SCRIPTS = \
 	setup.ksh \
 	cleanup.ksh \
-	reservation_001_pos.sh \
-	reservation_002_pos.sh \
-	reservation_003_pos.sh \
-	reservation_004_pos.sh \
-	reservation_005_pos.sh \
-	reservation_006_pos.sh \
-	reservation_007_pos.sh \
-	reservation_008_pos.sh \
-	reservation_009_pos.sh \
-	reservation_010_pos.sh \
-	reservation_011_pos.sh \
-	reservation_012_pos.sh \
-	reservation_013_pos.sh \
-	reservation_014_pos.sh \
-	reservation_015_pos.sh \
-	reservation_016_pos.sh \
-	reservation_017_pos.sh \
-	reservation_018_pos.sh \
-	reservation_019_pos.sh \
-	reservation_020_pos.sh \
-	reservation_021_neg.sh \
-	reservation_022_pos.sh
+	reservation_001_pos.ksh \
+	reservation_002_pos.ksh \
+	reservation_003_pos.ksh \
+	reservation_004_pos.ksh \
+	reservation_005_pos.ksh \
+	reservation_006_pos.ksh \
+	reservation_007_pos.ksh \
+	reservation_008_pos.ksh \
+	reservation_009_pos.ksh \
+	reservation_010_pos.ksh \
+	reservation_011_pos.ksh \
+	reservation_012_pos.ksh \
+	reservation_013_pos.ksh \
+	reservation_014_pos.ksh \
+	reservation_015_pos.ksh \
+	reservation_016_pos.ksh \
+	reservation_017_pos.ksh \
+	reservation_018_pos.ksh \
+	reservation_019_pos.ksh \
+	reservation_020_pos.ksh \
+	reservation_021_neg.ksh \
+	reservation_022_pos.ksh
 
 dist_pkgdata_DATA = \
 	reservation.cfg \