feat: add built-in liveness probe (/livez)

[blckngm]

A node become not live if it hasn't produced, received, submitted or
confirmed a block in a while.

[gw-bot]

Running integration test

Workflow Run Id: 3049680180

Components:

• prebuilds: 1.6-rc-202209030552,1.6-rc
• godwoken: ed1f27b
• scripts: prebuilds 430247e
• polyjuice: prebuilds dff407d
• kicker: e5d1015
• tests: 4b3e28c

Manually running integration test

Post a comment contains

/itest
[prebuilds: tag]
[godwoken: branch/ref]
[scripts: branch/ref]
[polyjuice: branch/ref]
[web3: branch/ref]
[kicker: branch/ref]
[tests: branch/ref]

Note: [] means optional, for example

/itest
prebuilds: dev-202203280240
godwoken: develop
scripts: 81676d9d53ffdf5bbaa60483928d07da16eb4a88
polyjuice: e37553b9

Run Result

success