Update pipeline to CMSSW_15_0_0_pre1
Update .gitlab-ci.yml
file to CMSSW_15_0_0_pre1
so it runs with latest ywkao:hgcal-dqm_with_th2poly-13_2_X
(PR #41932 to CMSSW), needed for TH2Poly
in the DQM code.
Update .gitlab-ci.yml
file to CMSSW_15_0_0_pre1
so it runs with latest ywkao:hgcal-dqm_with_th2poly-13_2_X
(PR #41932 to CMSSW), needed for TH2Poly
in the DQM code.