Merge remote-tracking branch 'origin/fix-ci-reset' into integration_2026_w07 (!3906)

fix(ci): remove git reset command from Jenkinsfile

- By default, the variable eNB_CommitID is set as 'develop' in the
  config
- When OAI-FLEXRIC-RAN-Integration-Test is triggered by upstream FlexRIC
  push events, it takes develop
- Triggered by RAN takes commit SHA where origin/SHA does not work

Below are issues seen after this week's merge to develop:

    https://jenkins-oai.eurecom.fr/view/RAN/job/RAN-Ubuntu-ARM-Image-Builder/4103/pipeline-overview/?selected-node=44

    08:43:07  + git reset --hard origin/9777d23173a740de7cf982659fae13ad6627d3aa
    08:43:07  fatal: ambiguous argument 'origin/9777d23173a740de7cf982659fae13ad6627d3aa': unknown revision or path not in the working tree.

When triggered through upstream FlexRIC (as a PUSH Event), it is taking
the branch as shown in the logs:

    https://jenkins-oai.eurecom.fr/job/OAI-FLEXRIC-RAN-Integration-Test/3832/pipeline-overview/?selected-node=47

    13:45:27  + git reset --hard origin/develop
    13:45:27  HEAD is now at 9777d23173 Merge branch 'integration_2026_w06' into 'develop'

ci-scripts/Jenkinsfile

@@ -115,7 +115,6 @@ pipeline {
             } else {
               sh "git fetch"
               sh "git checkout -f ${commitID}"
-              sh "git reset --hard origin/${commitID}"
             }
           } else {
             echo "\u274C Some parameters are missing"