optimize http connection multiplexing

[lyh169]

This feature can make the http multiplexing connection, because the zkevm-pool-manager is a sever, a large number tx make need a lot of port.

This is log beacuse of send a large number tx to zkevm-pool-manager ,it will have a error:

2025-03-20T03:44:29.651Z	�[34mINFO�[0m	server/endpoints.go:78	sending tx [40649]:0x94ef87e24ec1901c43282001ef561d50b6e351ebbb5dbed88be06fcd20f00464 to sequencer returns error: Post "http://erigon-seq:8123": dial tcp 172.21.0.9:8123: connect: cannot assign requested address	{"pid": 1, "version": "v0.1.2"}

shell for statistics on the number of connection ports :

watch -n 1 "ss -atn | grep 8123 | wc -l"

this is the develop branch statistics :

this is this pr statistics

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud