modify column keeps writing temp column to tableinfo during upgrade from 8.1 -> 8.5, when there are multiple owners

[D3Hunter]

Bug Report

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1. Minimal reproduce step (Required)

• during upgrade, trigger this issue multiple owner might exist at same time if keys are delete manually #54689 on the older node A
• during the upgrade there is a ALTER TABLE mysql.tidb_runaway_queries MODIFY COLUMN plan_digest varchar(64) DEFAULT ''; submitted by the 8.5 node which will force to be owner, and the job is using v1 args, but it contains 8 args, below is the code of 8.5.0
  

  tidb/pkg/meta/model/job_args.go

  Lines 1690 to 1694 in 244062f

  	func (a *ModifyColumnArgs) getArgsV1(*Job) []any {
  	return []any{
  	a.Column, a.OldColumnName, a.Position, a.ModifyColumnType,
  	a.NewShardBits, a.ChangingColumn, a.ChangingIdxs, a.RedundantIdxs,
  	}

• if the job is run on A, it will append args, but A only uses the first 8, the appended args is useless.
  • if the job is created by older version, the job will only have 5 args initially, will append args will work, below is the code of 8.1.0
    

    tidb/pkg/ddl/ddl_api.go

    Line 6027 in 945d07c

    Args: []any{&newCol.ColumnInfo, originalColName, spec.Position, modifyColumnTp, newAutoRandBits},

• so modifyInfo.changingCol is nil all the time, and it's initialized and inserted into the tableinfo every time(code of 8.1.0):
  

  tidb/pkg/ddl/column.go

  Lines 570 to 571 in 945d07c

  	changingCol := modifyInfo.changingCol
  	if changingCol == nil {

• as node A keeps running the job, we got a tableinfo like this:

{
  "id": 432102,
  "name": {
   "O": "tidb_runaway_queries",
   "L": "tidb_runaway_queries"
  },
  "charset": "utf8mb4",
  "collate": "utf8mb4_bin",
  "cols": [
..... other columns
  {
    "id": 3546,
    "name": {
     "O": "_Col$_plan_digest_3536",
     "L": "_col$_plan_digest_3536"
    },
    "offset": 3545,
.....
}

2. What did you expect to see? (Required)

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

see title