sorter(cdc): add config cache-size

[hicqu]

What problem does this PR solve?

Issue Number: ref #8974

What is changed and how it works?

#8982 sets sorter.max-memory-percentage to 0 by default. It can cause an error:

[2023/05/18 23:44:57.290 +08:00] [DEBUG] [redo_log_worker.go:103] ["redo task finished"] [namespace=default] [changefeed=26b89b91-ab77-4438-b4bc-680e6ef6ab00] [span={table_id:90,start_key:7480000000000000ff5a5f720000000000fa,end_key:7480000000000000ff5a5f730000000000fa}] [lowerBound="{\"StartTs\":0,\"CommitTs\":441561825225998342}"] [upperBound="{\"StartTs\":441561826536718335,\"CommitTs\":441561826536718336}"] [lastPos="{\"StartTs\":441561825396129817,\"CommitTs\":441561825396129819}"] [lag=9.347587602] [error="msgp: attempted to decode type \"int\" with method for \"map\""] [errorVerbose="msgp: attempted to decode type \"int\" with method for \"map\"\ngithub.com/pingcap/errors.AddStack\n\t/home/qupeng/.go/pkg/mod/github.com/pingcap/errors@v0.11.5-0.20221009092201-b66cddb77c32/errors.go:174\ngithub.com/pingcap/errors.Trace\n\t/home/qupeng/.go/pkg/mod/github.com/pingcap/errors@v0.11.5-0.20221009092201-b66cddb77c32/juju_adaptor.go:15\ngithub.com/pingcap/tiflow/cdc/processor/sourcemanager/engine/pebble/encoding.(*MsgPackGenSerde).Unmarshal\n\t/home/qupeng/.go/src/github.com/pingcap/tiflow/cdc/processor/sourcemanager/engine/pebble/encoding/value.go:45\ngithub.com/pingcap/tiflow/cdc/processor/sourcemanager/engine/pebble.(*EventIter).Next\n\t/home/qupeng/.go/src/github.com/pingcap/tiflow/cdc/processor/sourcemanager/engine/pebble/event_sorter.go:362\ngithub.com/pingcap/tiflow/cdc/processor/sourcemanager/engine.(*MountedEventIter).readBatch\n\t/home/qupeng/.go/src/github.com/pingcap/tiflow/cdc/processor/sourcemanager/engine/mounted_iter.go:106\ngithub.com/pingcap/tiflow/cdc/processor/sourcemanager/engine.(*MountedEventIter).Next\n\t/home/qupeng/.go/src/github.com/pingcap/tiflow/cdc/processor/sourcemanager/engine/mounted_iter.go:63\ngithub.com/pingcap/tiflow/cdc/processor/sinkmanager.(*redoWorker).handleTask\n\t/home/qupeng/.go/src/github.com/pingcap/tiflow/cdc/processor/sinkmanager/redo_log_worker.go:120\ngithub.com/pingcap/tiflow/cdc/processor/sinkmanager.(*redoWorker).handleTasks\n\t/home/qupeng/.go/src/github.com/pingcap/tiflow/cdc/processor/sinkmanager/redo_log_worker.go:63\ngithub.com/pingcap/tiflow/cdc/processor/sinkmanager.(*SinkManager).startRedoWorkers.func1\n\t/home/qupeng/.go/src/github.com/pingcap/tiflow/cdc/processor/sinkmanager/manager.go:338\ngolang.org/x/sync/errgroup.(*Group).Go.func1\n\t/home/qupeng/.go/pkg/mod/golang.org/x/sync@v0.1.0/errgroup/errgroup.go:75\nruntime.goexit\n\t/home/qupeng/.local/opt/go1.20.1/src/runtime/asm_amd64.s:1598"]

So we add a new config sorter.cache-size. The dafault value is 128, which means 128M.

Check List

Tests

• Unit test

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• nongfushanquan
• sdojjy

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[hicqu]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 0dddffa

[hicqu]

/test verify

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #9029.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #9030.