Release v1.4.5

[csuzhangxc]

This is an issue tracking the tidb-operator v1.4.5 release.

Previous:

• Release v1.4.4 #4927

Pending PRs:

• fix TiCDC across K8s address #5060
• fix(volume): fix panic bug when enable ModifyVolume feature #5058

TODO:

• Update default version of TiDB Operator Bump operator version to 1.4.5 #5070
• Update TiDB version and tools (may include DM) version if necessary bump TiDB components version to v7.1.0 #5079
• Update the TiDB version and tools version in docs-tidb-operator repo
  • updated before, en,zh: Bump tidb components to v7.1.0 docs-tidb-operator#2367
• Update release notes en,zh: release note for 1.4.5 docs-tidb-operator#2379
• Update Github Releases https://github.com/pingcap/tidb-operator/releases/tag/v1.4.5
• Build and publish docker images/helm charts
• Announcement (slack, email, etc.)
• Update TiDB Operator version in docs-tidb-operator repo (both for dev and stable branch) en,zh: bump operator to v1.4.5 for release-1.4 docs-tidb-operator#2393