Release v1.4.0

[KanShiori]

This is an issue tracking the tidb-operator v1.4.0 release.

Previous:

• Release v1.4.0-beta.4 #4792

Pending PRs:

TODO:

• Update default version of TiDB Operator bump operator to v1.4.0 and tidb to v6.5.0 #4814
• Update TiDB version and tools (may include DM) version if necessary bump operator to v1.4.0 and tidb to v6.5.0 #4814
• Update the TiDB version and tools version in docs-tidb-operator repo en,zh: Bump tidb components to v6.5.0 docs-tidb-operator#2148
• Update release notes en,zh: add v1.4 GA release notes and whats new docs-tidb-operator#2144
• Update Github Releases
• Build and publish docker images/helm charts
• Announcement (slack, email, etc.)
• Update TiDB Operator version in docs-tidb-operator repo
  • en,zh: bump operator to v1.4.0 docs-tidb-operator#2147
  • bump operator to v1.4.0 for release-1.4 docs-tidb-operator#2149