testing: move atf-pytest-wrapper to /usr/libexec

Move pytest wrapper to the collection of the other atf wrappers
 in libexec. It solves the problem of combining bits & pieces from
 bsd.test.mk and bgs.prog.mk to address "test binary, but not the
 suite binary".

Reviewed by:	kp
Differential Revision: https://reviews.freebsd.org/D35604
MFC after:	2 weeks

etc/mtree/BSD.tests.dist

@@ -421,6 +421,8 @@
         atf
             atf-check
             ..
+            atf-pytest-wrapper
+            ..
             atf-sh
             ..
         ..

libexec/atf/Makefile

@@ -25,6 +25,6 @@
 #
 # $FreeBSD$
 
-SUBDIR=	atf-check atf-sh tests
+SUBDIR=	atf-check atf-pytest-wrapper atf-sh tests
 
 .include <bsd.subdir.mk>

libexec/atf/atf-pytest-wrapper/Makefile

@@ -1,13 +1,10 @@
 .include <src.opts.mk>
+.include <bsd.init.mk>
 
 PACKAGE=	tests
 PROG_CXX=	atf_pytest_wrapper
 SRCS=		atf_pytest_wrapper.cpp
 CXXSTD=		c++17
 MAN=
-BINDIR=
-
-.include <bsd.own.mk>
-DESTDIR=${TESTSBASE}
 
 .include <bsd.prog.mk>

share/mk/atf.test.mk

@@ -145,7 +145,7 @@ CLEANFILES+= ${_T} ${_T}.tmp
 ATF_TESTS_PYTEST_SED_${_T}?= # empty
 ATF_TESTS_PYTEST_SRC_${_T}?= ${.CURDIR}/${_T:S,.xtmp$,,}
 ${_T}:
-	echo "#!${TESTSBASE}/atf_pytest_wrapper -P ${TESTSBASE}" > ${.TARGET}.tmp
+	echo "#! /usr/libexec/atf_pytest_wrapper -P ${TESTSBASE}" > ${.TARGET}.tmp
 .if empty(ATF_TESTS_PYTEST_SED_${_T})
 	cat ${ATF_TESTS_PYTEST_SRC_${_T}}  >>${.TARGET}.tmp
 .else

tests/Makefile

@@ -11,7 +11,6 @@ KYUAFILE= yes
 SUBDIR+= etc
 SUBDIR+= sys
 SUBDIR+= atf_python
-SUBDIR+= freebsd_test_suite
 
 SUBDIR_PARALLEL=