Merge pull request vllm-project#16 from z103cb/update-ibm-main-owners

chore: add OWNERS file to ibm_main

Author: z103cb

OWNERS

@@ -0,0 +1,21 @@
+approvers:
+  - danielezonca
+  - dtrifiro
+  - heyselbi
+  - israel-hdez
+  - Jooho
+  - rpancham
+  - spolti
+  - terrytangyuan
+  - vaibhavjainwiz
+  - VedantMahabaleshwarkar
+  - Xaenalt
+  - z103cb
+reviewers:
+  - dtrifiro
+  - heyselbi
+  - rpancham
+  - terrytangyuan
+  - vaibhavjainwiz
+  - Xaenalt
+  - z103cb