lib/googletest: Move to a new googletest package

gtest/gmock are not normally used by users unless running the tests,
so they shouldn't be in the utilities package.  Move them to a new
googletest package, to match what we did with ATF/Kyua.

While here, move tests dependencies from tests-all.ucl to tests.ucl,
which is the canonical place for that.

This change adds a new package to the system so, until we have a proper
policy on how to handle this in release/stable branches, it should not
be MFC'd.

MFC after:	never
Reported by:	emaste
Reviewed by:	manu
Sponsored by:	https://www.patreon.com/bsdivy
Differential Revision:	https://reviews.freebsd.org/D53607

lib/googletest/Makefile.inc

@@ -1,5 +1,7 @@
 .include <googletest.test.inc.mk>
 
+PACKAGE?=	googletest
+
 GTEST_DIR=	${SRCTOP}/contrib/googletest
 GOOGLEMOCK_SRCROOT= ${GTEST_DIR}/googlemock
 GOOGLETEST_SRCROOT= ${GTEST_DIR}/googletest

lib/googletest/tests/Makefile

@@ -1,4 +1,7 @@
 .PATH:		${SRCTOP}/tests
+
+PACKAGE=	tests
+
 KYUAFILE=	yes
 
 # Note: we start the gmock_main and gmock tests first since those take up to

lib/googletest/tests/Makefile.inc

@@ -3,6 +3,8 @@
 # rather than installing all of them to /usr/tests/lib/googletest
 TESTSDIR=	${TESTSBASE}/lib/googletest/${.CURDIR:T}
 
+PACKAGE=	tests
+
 # Clang's optimizer spends a really long time on these tests at -O2. Changing
 # -O2 to -O1 reduces the -j32 time for lib/googletest/test from 131s to 71s.
 # Using -O0 further reduces the time to 29s, and also reduces the disk usage