testsuite: fix FLUX_HWLOC_XMLFILE test under flux-run(1)

Problem: When used under flux-run(1), the FLUX_HWLOC_XMLFILE test in
t0001-basic.t may fail due to CPU affinity.

Add the resource.norestrict option to the test instance. This removes any
influence of the test's current cpu affinity.

t/t0001-basic.t

@@ -372,8 +372,13 @@ test_expect_success 'flux-start dies gracefully when run from removed dir' '
 command -v hwloc-ls >/dev/null && test_set_prereq HWLOC_LS
 test_expect_success HWLOC_LS 'FLUX_HWLOC_XMLFILE works' '
 	hwloc-ls --of xml -i "numa:2 core:3 pu:1" >test.xml &&
-	FLUX_HWLOC_XMLFILE=test.xml flux start -s 2 flux resource info \
-		>rinfo.out &&
+	cat <<-EOF >norestrict.conf &&
+	[resource]
+	norestrict = true
+	EOF
+	FLUX_HWLOC_XMLFILE=test.xml \
+		flux start -s2 -o,--conf=norestrict.conf \
+			flux resource info >rinfo.out &&
 	test_debug "cat rinfo.out" &&
 	grep "12 Cores" rinfo.out
 '