Switch current partition_id value to 101 for ci_pipeline_variables

For the p_ci_pipelines_variables table we will have [two partitions] to start:

• ci_pipelines_variables FOR VALUES IN ('100')
• gitlab_partitions_dynamic.ci_pipelines_variables_101 FOR VALUES IN ('101')

Switching partition_id to 101 will stop the growth of the ci_pipelines_variables table because the new records will be persisted in the ci_pipelines_variables_101 table.