Add e2e case for TiDB Operator upgrade

[DanielZhangQD]

Feature Request

Is your feature request related to a problem? Please describe:

Add e2e case for TiDB Operator upgrade, refer to #4430.

• Deploy TiDB Operator v1.2.7 + TiDB/TiFlash v5.3.0
  • Check TiDB cluster is ready
  • Prepare 4 tables with some data
  • Enable TiFlash replica for table 1, check that replica is ready in TiFlash and data in table 1 can be queried from TiFlash
  • Data in table 2 can be queried from TiKV, insert some data to table 2
  • Upgrade to the TiDB Operator with this fix, no rolling update occurs
  • Enable TiFlash replica for table 3, check that replica is ready in TiFlash and data in table 1,3 can be queried from TiFlash
  • Data in table 2 can be queried from TiKV, insert some data to table 2
  • Upgrade TiDB to the latest version in e2e, e.g. v5.4.0, TiDB cluster is ready, enable TiFlash replica for table 4, check that replica is ready in TiFlash and data in table 1,3,4 can be queried from TiFlash.
  • Data in table 2 can be queried from TiKV, insert some data to table 2
    Describe the feature you'd like:

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

[DanielZhangQD]

We need to cover the TLS case.