test(e2e): disable auto-tiebreaker in two-volume-rd + two-primaries

These tests only validate the 2-replica path; the witness on N3
slows initial sync without adding test signal and (when 3-replica
sync runs slower than 180s on the busy stand) flips the test from
PASS to a timing-bound FAIL.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Andrei Kvapil <kvapss@gmail.com>

Author: kvaps

tests/e2e/two-primaries-live-migration.sh

@@ -41,6 +41,9 @@ metadata: {name: ${RD}}
 spec:
   props:
     DrbdOptions/Net/allow-two-primaries: "yes"
+    # 2-replica RD is what live-migration needs; the witness on N3
+    # would slow initial sync without adding test signal.
+    DrbdOptions/AutoAddQuorumTiebreaker: "false"
   volumeDefinitions:
     - {volumeNumber: 0, sizeKib: 65536}
 EOF

tests/e2e/two-volume-rd.sh

@@ -25,11 +25,16 @@ N2=test-worker-2
 trap 'delete_rd "$RD"' EXIT
 
 echo ">> apply 2-volume RD"
+# Disable auto-tiebreaker — this test only validates per-volume
+# replication on the explicit 2-replica pair, the 3rd-node witness
+# would just slow initial sync and add no value here.
 cat <<EOF | kubectl apply -f -
 apiVersion: blockstor.io.blockstor.io/v1alpha1
 kind: ResourceDefinition
 metadata: {name: ${RD}}
 spec:
+  props:
+    DrbdOptions/AutoAddQuorumTiebreaker: "false"
   volumeDefinitions:
     - {volumeNumber: 0, sizeKib: 65536}
     - {volumeNumber: 1, sizeKib: 32768}