Restore the 9.0.8 version for BwC testing (elastic#138407) (elastic#138416)

This version was previously incorrectly removed by automation, because
of the manual change in elastic#136620.

Author: jozala

.buildkite/pipelines/periodic-java-ea.yml

@@ -385,8 +385,8 @@ steps:
             - signal_reason: agent_stop
               limit: 3
 
-      - label: 9.0.7 / bwc
-        command: .ci/scripts/run-gradle.sh -Druntime.java=$$JAVA_EA_VERSION -Dbwc.checkout.align=true v9.0.7#bwcTest
+      - label: 9.0.8 / bwc
+        command: .ci/scripts/run-gradle.sh -Druntime.java=$$JAVA_EA_VERSION -Dbwc.checkout.align=true v9.0.8#bwcTest
         timeout_in_minutes: 300
         agents:
           provider: gcp
@@ -395,7 +395,7 @@ steps:
           buildDirectory: /dev/shm/bk
           preemptible: true
         env:
-          BWC_VERSION: 9.0.7
+          BWC_VERSION: 9.0.8
         retry:
           automatic:
             - exit_status: "-1"

.buildkite/pipelines/periodic-packaging.yml

@@ -351,8 +351,8 @@ steps:
         env:
           BWC_VERSION: 8.19.8
 
-      - label: "{{matrix.image}} / 9.0.7 / packaging-tests-upgrade"
-        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v9.0.7
+      - label: "{{matrix.image}} / 9.0.8 / packaging-tests-upgrade"
+        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v9.0.8
         timeout_in_minutes: 300
         matrix:
           setup:
@@ -365,7 +365,7 @@ steps:
           machineType: custom-16-32768
           buildDirectory: /dev/shm/bk
         env:
-          BWC_VERSION: 9.0.7
+          BWC_VERSION: 9.0.8
 
       - label: "{{matrix.image}} / 9.1.8 / packaging-tests-upgrade"
         command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v9.1.8

.buildkite/pipelines/periodic.yml

@@ -382,8 +382,8 @@ steps:
             - signal_reason: agent_stop
               limit: 3
 
-      - label: 9.0.7 / bwc
-        command: .ci/scripts/run-gradle.sh --continue -Dbwc.checkout.align=true v9.0.7#bwcTest
+      - label: 9.0.8 / bwc
+        command: .ci/scripts/run-gradle.sh --continue -Dbwc.checkout.align=true v9.0.8#bwcTest
         timeout_in_minutes: 300
         agents:
           provider: gcp
@@ -392,7 +392,7 @@ steps:
           buildDirectory: /dev/shm/bk
           preemptible: true
         env:
-          BWC_VERSION: 9.0.7
+          BWC_VERSION: 9.0.8
         retry:
           automatic:
             - exit_status: "-1"

.ci/bwcVersions

@@ -19,6 +19,6 @@ BWC_VERSION:
   - "8.17.10"
   - "8.18.8"
   - "8.19.8"
-  - "9.0.7"
+  - "9.0.8"
   - "9.1.8"
   - "9.2.2"

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

@@ -232,6 +232,7 @@ public class Version implements VersionId<Version>, ToXContentFragment {
     public static final Version V_9_0_5 = new Version(9_00_05_99);
     public static final Version V_9_0_6 = new Version(9_00_06_99);
     public static final Version V_9_0_7 = new Version(9_00_07_99);
+    public static final Version V_9_0_8 = new Version(9_00_08_99);
     public static final Version V_9_1_0 = new Version(9_01_00_99);
     public static final Version V_9_1_1 = new Version(9_01_01_99);
     public static final Version V_9_1_2 = new Version(9_01_02_99);