Remove tibco-testing pipeline trigger

The tibco-testing pipeline has hardcoded expected span meta maps that
break whenever new propagation tags are added (e.g. _dd.p.ksr from
#10802). Remove the trigger to unblock master.

See also: #10906

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bm1549

.gitlab-ci.yml

@@ -837,32 +837,6 @@ deploy_to_profiling_backend:
     UPSTREAM_BRANCH: $CI_COMMIT_BRANCH
     UPSTREAM_TAG: $CI_COMMIT_TAG
 
-trigger_tibco_tests:
-  stage: tests
-  needs: [ build ]
-  rules:
-    - if: '$POPULATE_CACHE'
-      when: never
-    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
-      when: on_success
-    - if: '$CI_COMMIT_TAG =~ /^v.*/'
-      when: on_success
-    - when: manual
-      allow_failure: true
-  trigger:
-    project: DataDog/tibco-testing
-    branch: main
-    strategy: depend
-  variables:
-    UPSTREAM_PACKAGE_JOB: $BUILD_JOB_NAME
-    UPSTREAM_PACKAGE_JOB_ID: $BUILD_JOB_ID
-    UPSTREAM_PROJECT_ID: $CI_PROJECT_ID
-    UPSTREAM_PROJECT_NAME: $CI_PROJECT_NAME
-    UPSTREAM_PIPELINE_ID: $CI_PIPELINE_ID
-    UPSTREAM_BRANCH: $CI_COMMIT_BRANCH
-    UPSTREAM_TAG: $CI_COMMIT_TAG
-    FORCE_TRIGGER: $FORCE_TRIGGER
-
 deploy_to_di_backend:manual:
   stage: publish
   needs: [ build ]