tests: fix TESTSUITE_AT

Problem reported by Lukas Javorsky <ljavorsk@redhat.com> in:
https://lists.gnu.org/r/bug-tar/2023-07/msg00002.html
* tests/Makefile.am (TESTSUITE_AT): Add exclude17.at, exclude18.at.
Remove compress.m4; all uses changed.  Add a comment saying how
to rederive this.  Sort.

tests/Makefile.am

@@ -45,21 +45,24 @@ $(srcdir)/package.m4: $(top_srcdir)/configure.ac
 ## Test suite.  ##
 ## ------------ ##
 
+# You can generate the body of this macro with the following shell command:
+# LC_ALL=C ls *.at */*.at | sed -e 's/^/ /' -e '$!s/$/\\/'
 TESTSUITE_AT = \
- testsuite.at\
- compress.m4\
  T-cd.at\
  T-dir00.at\
  T-dir01.at\
  T-empty.at\
+ T-mult.at\
+ T-nest.at\
+ T-nonl.at\
  T-null.at\
  T-null2.at\
  T-rec.at\
  T-recurse.at\
  T-zfile.at\
- T-nonl.at\
- T-mult.at\
- T-nest.at\
+ acls01.at\
+ acls02.at\
+ acls03.at\
  add-file.at\
  append.at\
  append01.at\
@@ -68,14 +71,15 @@ TESTSUITE_AT = \
  append04.at\
  append05.at\
  backup01.at\
- chtype.at\
- comprec.at\
- comperr.at\
+ capabs_raw01.at\
  checkpoint/defaults.at\
- checkpoint/interval.at\
- checkpoint/dot.at\
  checkpoint/dot-compat.at\
  checkpoint/dot-int.at\
+ checkpoint/dot.at\
+ checkpoint/interval.at\
+ chtype.at\
+ comperr.at\
+ comprec.at\
  delete01.at\
  delete02.at\
  delete03.at\
@@ -83,6 +87,8 @@ TESTSUITE_AT = \
  delete05.at\
  delete06.at\
  difflink.at\
+ dirrem01.at\
+ dirrem02.at\
  exclude.at\
  exclude01.at\
  exclude02.at\
@@ -100,6 +106,8 @@ TESTSUITE_AT = \
  exclude14.at\
  exclude15.at\
  exclude16.at\
+ exclude17.at\
+ exclude18.at\
  extrac01.at\
  extrac02.at\
  extrac03.at\
@@ -127,11 +135,9 @@ TESTSUITE_AT = \
  extrac25.at\
  filerem01.at\
  filerem02.at\
- dirrem01.at\
- dirrem02.at\
- gzip.at\
  grow.at\
- incremental.at\
+ gzip.at\
+ ignfail.at\
  incr01.at\
  incr02.at\
  incr03.at\
@@ -143,8 +149,8 @@ TESTSUITE_AT = \
  incr09.at\
  incr10.at\
  incr11.at\
+ incremental.at\
  indexfile.at\
- ignfail.at\
  label01.at\
  label02.at\
  label03.at\
@@ -188,22 +194,16 @@ TESTSUITE_AT = \
  opcomp04.at\
  opcomp05.at\
  opcomp06.at\
- positional01.at\
- positional02.at\
- positional03.at\
  options.at\
  options02.at\
  options03.at\
  owner.at\
  pipe.at\
- recurse.at\
+ positional01.at\
+ positional02.at\
+ positional03.at\
  recurs02.at\
- rename01.at\
- rename02.at\
- rename03.at\
- rename04.at\
- rename05.at\
- rename06.at\
+ recurse.at\
  remfiles01.at\
  remfiles02.at\
  remfiles03.at\
@@ -226,11 +226,19 @@ TESTSUITE_AT = \
  remfiles09b.at\
  remfiles09c.at\
  remfiles10.at\
+ rename01.at\
+ rename02.at\
+ rename03.at\
+ rename04.at\
+ rename05.at\
+ rename06.at\
  same-order01.at\
  same-order02.at\
+ selacl01.at\
+ selnx01.at\
  shortfile.at\
- shortupd.at\
  shortrec.at\
+ shortupd.at\
  sigpipe.at\
  sparse01.at\
  sparse02.at\
@@ -247,6 +255,13 @@ TESTSUITE_AT = \
  sptrcreat.at\
  sptrdiff00.at\
  sptrdiff01.at\
+ star/gtarfail.at\
+ star/gtarfail2.at\
+ star/multi-fail.at\
+ star/pax-big-10g.at\
+ star/ustar-big-2g.at\
+ star/ustar-big-8g.at\
+ testsuite.at\
  time01.at\
  time02.at\
  truncate.at\
@@ -255,21 +270,11 @@ TESTSUITE_AT = \
  update02.at\
  update03.at\
  update04.at\
- volsize.at\
- volume.at\
  verbose.at\
  verify.at\
  version.at\
- xform-h.at\
- xform01.at\
- xform02.at\
- xform03.at\
- star/gtarfail.at\
- star/gtarfail2.at\
- star/multi-fail.at\
- star/ustar-big-2g.at\
- star/ustar-big-8g.at\
- star/pax-big-10g.at\
+ volsize.at\
+ volume.at\
  xattr01.at\
  xattr02.at\
  xattr03.at\
@@ -278,12 +283,10 @@ TESTSUITE_AT = \
  xattr06.at\
  xattr07.at\
  xattr08.at\
- acls01.at\
- acls02.at\
- acls03.at\
- selnx01.at\
- selacl01.at\
- capabs_raw01.at
+ xform-h.at\
+ xform01.at\
+ xform02.at\
+ xform03.at
 
 distclean-local:
 	-rm -rf download
@@ -291,7 +294,7 @@ distclean-local:
 TESTSUITE = $(srcdir)/testsuite
 
 AUTOTEST = $(AUTOM4TE) --language=autotest
-$(TESTSUITE): package.m4 $(TESTSUITE_AT)
+$(TESTSUITE): compress.m4 package.m4 $(TESTSUITE_AT)
 	$(AUTOTEST) -I $(srcdir) testsuite.at -o $@.tmp
 	mv $@.tmp $@