Add corretto 11 and 8 to runtime javas (#41946)

We now have coretto on the ephemeral CI images so we can add it to our
regular java test matrix.
On backporting will also add  corretto8 to branches that support it.

Author: alpar-t

.ci/matrix-runtime-javas.yml

@@ -14,3 +14,5 @@ ES_RUNTIME_JAVA:
   - zulu8
   - zulu11
   - zulu12
+  - corretto11
+  - corretto8