[core] Add cx_Oracle 8.3.0 in base requirements (#3298)

Co-authored-by: Mahesh Balakrishnan <mbalakrishnan@cloudera.com>

desktop/core/base_requirements.txt

@@ -8,6 +8,7 @@ cffi==1.15.0
 channels==3.0.3
 channels-redis==3.2.0
 configobj==5.0.6
+cx-Oracle==8.3.0
 django-auth-ldap==2.3.0
 Django==3.2.16
 daphne==3.0.2