Implement Proxy's own status_server

[CalvinNeo]

Signed-off-by: CalvinNeo calvinneo1995@gmail.com

What problem does this PR solve?

Issue Number: ref pingcap/tiflash#5170

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[CalvinNeo]

need merge tikv#13234 for compat

[CalvinNeo]

Manual test

calvin@CalvinPC ~ % curl 127.0.0.1:20292/tiflash/sync-status/1
0

calvin@CalvinPC ~ % curl 127.0.0.1:20292/config
{"raftstore-proxy":{"log-level":"info","log-file":"","log-format":"text","log-rotation-timespan":"0s","log-rotation-size":"300MiB","slow-log-file":"","slow-log-threshold":"1s","abort-on-panic":false,"memory-usage-limit":2135599786,"memory-usage-high-water":0.9,"log":{"level":"info","format":"text","enable-timestamp":true,"file":{"filename":"/Users/calvin/.tiup/data/a/tiflash-0/log/tiflash_tikv.log","max-size":300,"max-days":0,"max-backups":0}},"quota":{"foreground-cpu-time":0,"foreground-write-bandwidth":"0KiB","foreground-read-bandwidth":"0KiB","max-delay-duration":"500ms"},"readpool":{"unified":{"min-thread-count":1,"max-thread-count":4,"stack-size":"10MiB","max-tasks-per-worker":2000},"storage":{"use-unified-pool":true,"high-concurrency":4,"normal-concurrency":4,"low-concurrency":4,"max-tasks-per-worker-high":2000,"max-tasks-per-worker-normal":2000,"max-tasks-per-worker-low":2000,"stack-size":"10MiB"},"coprocessor":{"use-unified-pool":true,"high-concurrency":6,"normal-concurrency":6,"low-concurrency":6,"max-tasks-per-worker-high":2000,"max-tasks-per-worker-normal":2000,"max-tasks-per-worker-low":2000,"stack-size":"10MiB"}},"server":{"addr":"0.0.0.0:20170","advertise-addr":"127.0.0.1:20170","status-addr":"0.0.0.0:20292","advertise-status-addr":"127.0.0.1:20292","status-thread-pool-size":1,"max-grpc-send-msg-len":10485760,"raft-client-grpc-send-msg-buffer":524288,"raft-client-queue-size":8192,"raft-msg-max-batch-size":128,"grpc-compressi ...

calvin@CalvinPC ~ % curl 127.0.0.1:20292/debug/pprof/profile
<?xml version="1.0" standalone="no"?> ...

[2022/08/17 20:51:06.952 +08:00] [INFO] [status_server.rs:150] ["Proxy's Status server started"]