test: skip TEST-13-NSPAWN.nspawn/machined, TEST-86-MULTI-PROFILE-UKI and TEST-07-PID1.private-pids.sh

These new tests are flaky, so disable them temporarily, until after
the release, to avoid pushing out new flakiness to consumers. They
will be re-enabled immediately after.

test/TEST-86-MULTI-PROFILE-UKI/meson.build

@@ -6,5 +6,6 @@ integration_tests += [
                 'storage' : 'persistent',
                 'vm' : true,
                 'firmware' : 'auto',
+                'enabled' : false,
         },
 ]

test/units/TEST-07-PID1.sh

@@ -10,6 +10,7 @@ set -o pipefail
 # See TEST-07-PID1/test.sh for the first "half" of the test
 mountpoint /issue2730
 
+export TEST_SKIP_SUBTESTS="private-pids"
 run_subtests
 
 touch /testok

test/units/TEST-13-NSPAWN.sh

@@ -13,6 +13,7 @@ fi
 # shellcheck source=test/units/test-control.sh
 . "$(dirname "$0")"/test-control.sh
 
+export TEST_SKIP_SUBTESTS="nspawn machined"
 run_subtests
 
 touch /testok