Cluster has no way to know which slots are available (#8732)

automerge

core/src/deprecated.rs

@@ -0,0 +1,21 @@
+use solana_sdk::clock::Slot;
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+enum CompressionType {
+    Uncompressed,
+    GZip,
+    BZip2,
+}
+
+impl Default for CompressionType {
+    fn default() -> Self {
+        Self::Uncompressed
+    }
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, Default, PartialEq)]
+pub(crate) struct EpochIncompleteSlots {
+    first: Slot,
+    compression: CompressionType,
+    compressed_list: Vec<u8>,
+}