Fix STATS_SAMPLE_PAGES syntax

[zier-one]

Index Issue: pingcap/tidb#11486

These are bad (incompatible) SQL cases:

ALTER TABLE t STATS_SAMPLE_PAGES 10
ALTER TABLE t STATS_SAMPLE_PAGES 0x0aaa , LOCK DEFAULT
ALTER TABLE t STATS_SAMPLE_PAGES = 123
ALTER TABLE t STATS_SAMPLE_PAGES = 11.11 AVG_ROW_LENGTH 11
ALTER TABLE t STATS_SAMPLE_PAGES = 10 MIN_ROWS = 12

Claim this subtask based on the comments below this issue.

[leiysky]

Let me fix it

[zier-one]

Let me fix it

ok thanks

[leiysky]

parser/ast/ddl.go

Lines 1589 to 1594 in 2414ee7

	case TableOptionStatsPersistent:
	// TODO: not support
	ctx.WriteKeyWord("STATS_PERSISTENT ")
	ctx.WritePlain("= ")
	ctx.WriteKeyWord("DEFAULT")
	ctx.WritePlain(" /* TableOptionStatsPersistent is not supported */ ")

Should I handle it in this way or append a warning in parser.y?

[zier-one]

no, if we can't restore sql text from ast, we throw a warn in Restore
but in this case, the ast include intact sql stmt data, so we don't need to throw a warn in Restore.

tidb don't support this feature, so we make a warn in parser