Merge branch 'js/ci-leak-skip-svn' into jch

Dscho observed that SVN tests are taking too much time in CI leak
checking tasks, but most time is spent not in our code but in libsvn
code (which happen to be written in Perl), whose leaks have little
value to discover for us.  Skip SVN, P4, and CVS tests in the leak
checking tasks.

* js/ci-leak-skip-svn:
  ci: skip CVS and P4 tests in leaks job, too
  ci(*-leaks): skip the git-svn tests to save time

ci/lib.sh

@@ -356,6 +356,9 @@ linux-musl-meson)
 	;;
 linux-leaks|linux-reftable-leaks)
 	export SANITIZE=leak
+	export NO_CVS_TESTS=LetsSaveSomeTime
+	export NO_SVN_TESTS=LetsSaveSomeTime
+	export NO_P4_TESTS=LetsSaveSomeTime
 	;;
 linux-asan-ubsan)
 	export SANITIZE=address,undefined

t/lib-cvs.sh

@@ -2,6 +2,12 @@
 
 . ./test-lib.sh
 
+if test -n "$NO_CVS_TESTS"
+then
+	skip_all='skipping git cvs tests, NO_CVS_TESTS defined'
+	test_done
+fi
+
 unset CVS_SERVER
 
 if ! type cvs >/dev/null 2>&1

t/lib-git-p4.sh

@@ -16,6 +16,11 @@ P4D_TIMEOUT=300
 
 . ./test-lib.sh
 
+if test -n "$NO_P4_TESTS"
+then
+	skip_all='skipping git p4 tests, NO_P4_TESTS defined'
+	test_done
+fi
 if ! test_have_prereq PYTHON
 then
 	skip_all='skipping git p4 tests; python not available'