[CI] testRecoveryAfterPrimaryPromotion failed

[dnhatn]

The testRecoveryAfterPrimaryPromotion expected a file-based sync happen but a sequence number based occurred instead. This test started failing since the replica-rollback (#28181) was merged.

Somce instances (not reproduce locally)

• CI: https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob-unix-compatibility/os=opensuse/1907/console

REPRODUCE WITH: ./gradlew :server:test \
  -Dtests.seed=1C1099CE2A03DA5C \
  -Dtests.class=org.elasticsearch.index.replication.RecoveryDuringReplicationTests \
  -Dtests.method="testRecoveryAfterPrimaryPromotion" \
  -Dtests.security.manager=true \
  -Dtests.locale=es-BO \
  -Dtests.timezone=Pacific/Port_Moresby

Log: testRecoveryAfterPrimaryPromotion-1.txt

• CI: https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob-unix-compatibility/os=debian/1907/console

REPRODUCE WITH: ./gradlew :server:test \
  -Dtests.seed=3F415A2110368AA7 \
  -Dtests.class=org.elasticsearch.index.replication.RecoveryDuringReplicationTests \
  -Dtests.method="testRecoveryAfterPrimaryPromotion" \
  -Dtests.security.manager=true \
  -Dtests.locale=es-BO \
  -Dtests.timezone=Antarctica/Mawson