release: prepare for release v1.5.8

[zzzckck]

Description

notice: v1.5.8 is for validator only, other full nodes can ignore this version.

v1.5.8 is a maintenance release for BSC mainnet validators to improve the current the PBS(MEV) mechanism.
Here are key points of this release:

• enabled GreedyMergeTx by default
• fix a critical error on GasUsed check: bids with full GasUsed was marked as invalid by mistake
• improvement: add a stop timer, so the last simulating bid would have more chance to be selected
• improvement: do not interrupt the simulating if new bid was arrived too later.

ChangeLog

FEATURE

• #2955 pbs: enable GreedyMergeTx by default

BUGFIX

• #2967 fix: gas compare in bid simulator

IMPROVEMENT

• #2951 bump golang.org/x/net from 0.34.0 to 0.36.0
• #0000 golang: upgrade toolchain to v1.23.0 (commit:3be156eec)
• #2957 miner: stop GreedyMergeTx before worker picking bids
• #2959 pbs: fix a inaccurate bid result log
• #2971 mev: no interrupt if it is too later
• #2974 miner: add metrics for bid simulation