ci: Use the OSTC container registry for test-generic jobs

The EF infrastructure (GitLab) doesn't support image registry. This
change switches the container images to use the OSTC registry while
EF catches up[1].

[1] eclipsefdn/helpdesk#1108



Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

.oniro-ci/test-generic.yaml

@@ -7,7 +7,7 @@
 .lava-test:
   interruptible: true
   image:
-    name: registry.booting.oniroproject.org/distro/oniro/bitbake-builder:latest
+    name: registry.ostc-eu.org/ostc/oniro/bitbake-builder:latest
   variables:
     GIT_STRATEGY: none
     CI_LAVA_INSTANCE: "https://lava.ostc-eu.org/"
@@ -100,7 +100,7 @@
   # Let the pipeline continue running 'lava-badge' job.
   allow_failure: true
   image:
-    name: registry.booting.oniroproject.org/distro/oniro/bitbake-builder:latest
+    name: registry.ostc-eu.org/ostc/oniro/bitbake-builder:latest
   stage: report
   variables:
     GIT_STRATEGY: none
@@ -151,7 +151,7 @@
 .lava-badge:
   interruptible: true
   image:
-    name: registry.booting.oniroproject.org/distro/oniro/bitbake-builder:latest
+    name: registry.ostc-eu.org/ostc/oniro/bitbake-builder:latest
   stage: report
   variables:
     GIT_STRATEGY: none