Changes

tikv-migration: increase pipeline timeout (#2778)

### Changes

For tikv-migration CDC pipelines:

- Increase timeout from `40` to `65` minutes 
- Original `40 minues` is not sufficient. See
https://do.pingcap.net/jenkins/blue/organizations/jenkins/tikv%2Fmigration%2Fpull_integration_kafka_test/detail/pull_integration_kafka_test/28/pipeline/261/.
- Increase timeout of `Test` stage from `25` to `45` minutes

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Signed-off-by: Ping Yu <yuping@pingcap.com>
 (commit: 811cc70)