Thin client quic (#23973) (#24266)

Change thin-client to use connection-cache

(cherry picked from commit 8b72200afb)

Co-authored-by: ryleung-solana <91908731+ryleung-solana@users.noreply.github.com>

net-utils/src/lib.rs

@@ -28,6 +28,9 @@ pub struct UdpSocketPair {
 
 pub type PortRange = (u16, u16);
 
+pub const VALIDATOR_PORT_RANGE: PortRange = (8000, 10_000);
+pub const MINIMUM_VALIDATOR_PORT_RANGE_WIDTH: u16 = 12; // VALIDATOR_PORT_RANGE must be at least this wide
+
 pub(crate) const HEADER_LENGTH: usize = 4;
 pub(crate) const IP_ECHO_SERVER_RESPONSE_LENGTH: usize = HEADER_LENGTH + 23;