AND type mv index filter mutations generating logic is wrong

[AilinKid]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

fix the AND mv index filter mutations generating logic.
SELECT * FROM t WHERE 15975127 member of (domains) AND 15975128 member of (domains) AND a = 1 AND b = 2
for mv index mvi(a, domains, b)
the accessFilters should be [a = 1, ?, b = 1], here ? is pos occupation here stands for set {15975127 member of (domains), 15975128 member of (domains)}
when building index partial path, we have two mutation here
a=1 and 15975127 member of (domains) and b=2
a=1 and 15975128 member of (domains) and b=2

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

accessFilters [a = 1, 15975127 member of (domains), b = 1]
MvIndexMutations[15975127 member of (domains), 15975128 member of (domains)]

3. What did you see instead (Required)

currently, in CollectFilters4MVIndexMutations, it will output

accessFilters as [a = 1, 15975127 member of (domains), 15975128 member of (domains), b = 1]
MvIndexMutations[15975127 member of (domains), 15975128 member of (domains)]

which is not desirable.

4. What is your TiDB version? (Required)