replication: Add replica metadata modification sync to Options

[poornas]

No description provided.

[ravindk89]

Looks fine from a docs perspective.

[klauspost]

=== RUN   TestAddReplicationRule
Error:     replication_test.go:149: Test 3: Expected Priority must be unique. Replication configuration already has a rule with this priority, got priority must be unique. Replication configuration already has a rule with this priority
Error:     replication_test.go:149: Test 6: Expected Role ARN does not match existing configuration, got role ARN does not match existing configuration
Error:     replication_test.go:149: Test 8: Expected A rule exists with this ID, got a rule exists with this ID
--- FAIL: TestAddReplicationRule (0.00s)
=== RUN   TestEditReplicationRule
Error:     replication_test.go:323: Test 4: Expected The destination bucket must be same for all rules, got the destination bucket must be same for all rules
Error:     replication_test.go:323: Test 7: Expected Priority must be unique. Replication configuration already has a rule with this priority, got priority must be unique. Replication configuration already has a rule with this priority

[kannappanr]

LGTM