Remove GetSessionVars in table.MutateContext

[lcwangchao]

Enhancement

GetSessionVars returns variable.SessionVars which exposes too many fields and it's hard to build correctly. It's better to remove it and exposes some fields we really needed outside to table.MutateContext.

• table: Use MutateBuffers to manage buffers #54394
• table: provide some binlog related methods for binlog in MutateContext #54433
• table: move add TTL insert rows metrics code out of table package #54521
• lightning: make table in BaseKVEncoder private and provide some wrapped methods #54673
• tables: reduce GetSessionVars from MutateContext in tables #54715
• table: expose some fields to MutateContext from GetSessionVars() #54767
• table: introduce RowIDShardGenerator and ReservedRowIDAlloc to alloc auto row id #54789
• table: Add CachedTableSupport and TemporaryTableSupport for MutateContext #54900
• table: refactor options for `Table.AddRecord/Table.UpdateRecord/IndexCreate #55125
• table: Add option SkipWriteUntouchedIndices for Table.UpdateRecord #55192
• table: add new option DupKeyCheckMode for table mutations #55194
• table: Add option DupKeyCheckLazy to check duplicated key lazily #55246
• table: Add PessimisticLazyDupKeyCheckMode to determine lazy mode in pessimistic txn #55360