Set version to 7.15 in BWC code (#76577)

Author: przemekwitek

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/transform/transforms/SettingsConfig.java

@@ -94,7 +94,7 @@ public SettingsConfig(final StreamInput in) throws IOException {
         } else {
             this.datesAsEpochMillis = DEFAULT_DATES_AS_EPOCH_MILLIS;
         }
-        if (in.getVersion().onOrAfter(Version.CURRENT)) {  // TODO: 7.15
+        if (in.getVersion().onOrAfter(Version.V_7_15_0)) {
             this.interimResults = in.readOptionalInt();
         } else {
             this.interimResults = DEFAULT_INTERIM_RESULTS;
@@ -146,7 +146,7 @@ public void writeTo(StreamOutput out) throws IOException {
         if (out.getVersion().onOrAfter(Version.V_7_11_0)) {
             out.writeOptionalInt(datesAsEpochMillis);
         }
-        if (out.getVersion().onOrAfter(Version.CURRENT)) {  // TODO: 7.15
+        if (out.getVersion().onOrAfter(Version.V_7_15_0)) {
             out.writeOptionalInt(interimResults);
         }
     }

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/transform/transforms/TransformConfig.java

@@ -556,7 +556,7 @@ private static TransformConfig applyRewriteForUpdate(Builder builder) {
         }
 
         // 3. set interim_results to true for transforms < 7.15 to keep BWC
-        if (builder.getVersion() != null && builder.getVersion().before(Version.CURRENT)) {  // TODO: 7.15
+        if (builder.getVersion() != null && builder.getVersion().before(Version.V_7_15_0)) {
             builder.setSettings(
                 new SettingsConfig(
                     builder.getSettings().getMaxPageSearchSize(),