Migrate initial transport version for 9.0 (elastic#134179)

This leaves the latest initial elasticsearch transport version for 9.0 as a marker.

ES-12334

Author: jdconrad

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -203,10 +203,6 @@ static TransportVersion def(int id) {
     public static final TransportVersion ESQL_FIXED_INDEX_LIKE_8_19 = def(8_841_0_64);
     public static final TransportVersion INITIAL_ELASTICSEARCH_8_19_4 = def(8_841_0_68);
     public static final TransportVersion V_9_0_0 = def(9_000_0_09);
-    public static final TransportVersion INITIAL_ELASTICSEARCH_9_0_1 = def(9_000_0_10);
-    public static final TransportVersion INITIAL_ELASTICSEARCH_9_0_2 = def(9_000_0_11);
-    public static final TransportVersion INITIAL_ELASTICSEARCH_9_0_3 = def(9_000_0_12);
-    public static final TransportVersion INITIAL_ELASTICSEARCH_9_0_4 = def(9_000_0_13);
     public static final TransportVersion INITIAL_ELASTICSEARCH_9_0_7 = def(9_000_0_16);
     public static final TransportVersion COHERE_BIT_EMBEDDING_TYPE_SUPPORT_ADDED = def(9_001_0_00);
     public static final TransportVersion REMOVE_SNAPSHOT_FAILURES = def(9_002_0_00);

server/src/main/resources/transport/definitions/unreferable/initial_elasticsearch_9_0_1.csv

@@ -0,0 +1 @@
+9000010

server/src/main/resources/transport/definitions/unreferable/initial_elasticsearch_9_0_2.csv

@@ -0,0 +1 @@
+9000011

server/src/main/resources/transport/definitions/unreferable/initial_elasticsearch_9_0_3.csv

@@ -0,0 +1 @@
+9000012

server/src/main/resources/transport/definitions/unreferable/initial_elasticsearch_9_0_4.csv

@@ -0,0 +1 @@
+9000013