Mute ydb/core/kqp/ut/close_with_load 2 tests in main

[ydbot]

Mute:
ydb/core/kqp/ut/close_with_load/KqpQueryService.CloseSessionsWithLoad
ydb/core/kqp/ut/close_with_load/KqpService.CloseSessionsWithLoad

Branch:
main

Add line to muted_ya.txt:

ydb/core/kqp/ut/close_with_load KqpQueryService.CloseSessionsWithLoad
ydb/core/kqp/ut/close_with_load KqpService.CloseSessionsWithLoad

Owner: TEAM:@ydb-platform/qp

Read more in mute_rules.md

Summary history:
KqpQueryService.CloseSessionsWithLoad: Muted Flaky(10-20)->Muted Stable(10-21) last 1 days, at 2025-10-18:2025-10-21: success_rate 96.7%, p-29, f-0, m-1, s-0, total-30
KqpService.CloseSessionsWithLoad: Flaky(10-20)->Passed(10-21)->Flaky(10-18)->Passed(10-19) last 1 days, at 2025-10-18:2025-10-21: success_rate 86.7%, p-26, f-4, m-0, s-0, total-30

Test run history: link

More info in dashboard

[ydbot]

Some tests have been unmuted:

• Test ydb/core/kqp/ut/close_with_load/KqpService.CloseSessionsWithLoad