Improve batch send performances

[Gsantomaggio]

Part of #365

• Change the lock type for unconfirmed messages. Use RWlock instead of Lock.
• Use the RLock when the map is read.
• Aggregate the messages and add unconfirmed messages in a batch way.
• Aggregate the messages and remove unconfirmed messages in a bach way.
• Pass point array of *messageSequence

This PR (using batch Send)

2024/11/28 15:41:06 [info] - Published 1,212,812.8 msg/s | Confirmed 1,211,755.8 msg/s |  Consumed 1,213,207.2 msg/s |  Full | Body sz: 8 | latency: 7 ms
2024/11/28 15:41:07 [info] - Published 1,229,614.8 msg/s | Confirmed 1,221,792.4 msg/s |  Consumed 1,228,231.6 msg/s |  Full | Body sz: 8 | latency: 7 ms
2024/11/28 15:41:08 [info] - Published 1,218,139.4 msg/s | Confirmed 1,216,236.7 msg/s |  Consumed 1,216,720.2 msg/s |  Full | Body sz: 8 | latency: 7 ms
2024/11/28 15:41:09 [info] - Published 1,212,503.1 msg/s | Confirmed 1,206,199.3 msg/s |  Consumed 1,206,561.9 msg/s |  Full | Body sz: 8 | latency: 7 ms
2024/11/28 15:41:10 [info] - Published 1,157,351.5 msg/s | Confirmed 1,145,312.3 msg/s |  Consumed 1,145,602.3 msg/s |  Full | Body sz: 8 | latency: 10 ms

Version 1.4.10 ( with Send )

2024/11/28 15:44:01 [info] - Published 955480.0 msg/s | Confirmed 954601.4 msg/s |  Consumed 954601.4 msg/s |  Full rate  |  Fixed Body: 8  |  msg sent: 4777500  |
2024/11/28 15:44:02 [info] - Published 947116.7 msg/s | Confirmed 942643.3 msg/s |  Consumed 941278.3 msg/s |  Full rate  |  Fixed Body: 8  |  msg sent: 5682800  |
2024/11/28 15:44:03 [info] - Published 945057.1 msg/s | Confirmed 943814.1 msg/s |  Consumed 943814.1 msg/s |  Full rate  |  Fixed Body: 8  |  msg sent: 6615500  |
2024/11/28 15:44:04 [info] - Published 948562.5 msg/s | Confirmed 947624.9 msg/s |  Consumed 947624.9 msg/s |  Full rate  |  Fixed Body: 8  |  msg sent: 7588600  |
2024/11/28 15:44:05 [info] - Published 953966.7 msg/s | Confirmed 953318.2 msg/s |  Consumed 953318.2 msg/s |  Full rate  |  Fixed Body: 8  |  msg sent: 8585800  |
^

cc @hiimjako