Changes

chore(prow-jobs/pingcap-inc/tici): increase resource limits for tici presubmit jobs (#3632)

To avoid task timeout(45 mins) failures caused by excessively long
compilation times, we need to increase some request resources.

Updated CPU and memory resource limits for the 'check' and 'ci-run-test'
jobs in presubmits.yaml to enhance performance during CI runs. CPU limit
changed from 2 to 6 and memory limit from 8Gi to 12Gi.
 (commit: 3541111)