CbcWestwolf

*: support ACCOUNT (UN)LOCK when creating/altering user

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### What problem does this PR solve? Issue Number: close #37051 Problem Summary: ### What is changed and how it works? ### Check List Tests - [ ] Unit test...

config, sysvar: move configs tmp-storage-* to instance sysvars

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### What problem does this PR solve? Issue Number: ref #34960 Problem Summary: Before, if we want to change the temporary storage path/quota in a node/instance, we have to change...

TiDB doesn't support ACCOUNT LOCK

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In [MySQL](https://dev.mysql.com/doc/refman/8.0/en/account-locking.html), you can lock or unlock a user/role by `CREATE USER` or `ALTER USER`. For compatibility, TiDB should support this feature.

sysvar: convert oom-use-tmp-storage to a sysvar tidb_enable_tmp_storage_on_oom

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### First-time contributors' checklist - [x] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-cn) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) Add description...

sysvar: introduce tidb_enable_ddl as an introduce scope sysvar

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### First-time contributors' checklist - [x] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-cn) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) Add description...

v6.3: Add description about SM3 encryption authentication

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### First-time contributors' checklist - [x] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-cn) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) ### Which...

TiCDC misses backslash(`\`) when replicating ddl to downstream

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### What did you do? This is a bug found in [tidb issue](https://github.com/pingcap/tidb/issues/37910). 1. Set sql mode in both upstream and downstream tidbs ```sql -- downstream set sql_mode = "NO_BACKSLASH_ESCAPES";...

config, sysvar: update descriptions about instance sysvars

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### First-time contributors' checklist - [x] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-cn) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) Change descriptions...

*: disable collecting execution info for `admin check table`

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### What problem does this PR solve? Issue Number: close #42299 Problem Summary: ### What is changed and how it works? ### Check List Tests - [ ] Unit test...