tools: add http server for heartbeat bench

[rleungx]

What problem does this PR solve?

Issue Number: Ref #7703.

What is changed and how does it work?

Check List

Tests

• Manual test

# ryan @ 10 in ~ [11:57:52] C:130
$ curl -X GET http://127.0.0.1:38767/config
{
    "PDAddr": "127.0.0.1:2379",
    "StatusAddr": "127.0.0.1:38767",
    "log": {
        "level": "",
        "format": "text",
        "disable-timestamp": false,
        "file": {
            "filename": "",
            "max-size": 0,
            "max-days": 0,
            "max-backups": 0
        },
        "development": false,
        "disable-caller": false,
        "disable-stacktrace": false,
        "disable-error-verbose": false,
        "sampling": null,
        "error-output-path": ""
    },
    "Logger": {},
    "LogProps": {
        "Core": {
            "LevelEnabler": "info"
        },
        "Syncer": {},
        "Level": "info"
    },
    "store-count": 50,
    "region-count": 1000000,
    "key-length": 56,
    "replica": 3,
    "leader-update-ratio": 0.06,
    "epoch-update-ratio": 0.04,
    "space-update-ratio": 0.15,
    "flow-update-ratio": 0.35,
    "sample": false,
    "round": 0
}%

# ryan @ 10 in ~ [11:58:07] C:130
$ curl -X PUT http://127.0.0.1:38767/config -H 'Content-Type: application/json' --data '{"flow-update-ratio": 0.0}'
Successfully updated the configuration%

# ryan @ 10 in ~ [11:58:14]
$ curl -X GET http://127.0.0.1:38767/config
{
    "PDAddr": "127.0.0.1:2379",
    "StatusAddr": "127.0.0.1:38767",
    "log": {
        "level": "",
        "format": "text",
        "disable-timestamp": false,
        "file": {
            "filename": "",
            "max-size": 0,
            "max-days": 0,
            "max-backups": 0
        },
        "development": false,
        "disable-caller": false,
        "disable-stacktrace": false,
        "disable-error-verbose": false,
        "sampling": null,
        "error-output-path": ""
    },
    "Logger": {},
    "LogProps": {
        "Core": {
            "LevelEnabler": "info"
        },
        "Syncer": {},
        "Level": "info"
    },
    "store-count": 50,
    "region-count": 1000000,
    "key-length": 56,
    "replica": 3,
    "leader-update-ratio": 0.06,
    "epoch-update-ratio": 0.04,
    "space-update-ratio": 0.15,
    "flow-update-ratio": 0,
    "sample": false,
    "round": 0
}%

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• CabinfeverB

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[codecov]

Codecov Report

Merging #7685 (eb660b8) into master (421959f) will increase coverage by 0.02%.
The diff coverage is n/a.

❗ Current head eb660b8 differs from pull request most recent head 96c7f8c. Consider uploading reports for the commit 96c7f8c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7685      +/-   ##
==========================================
+ Coverage   73.56%   73.59%   +0.02%     
==========================================
  Files         429      429              
  Lines       47435    47435              
==========================================
+ Hits        34896    34910      +14     
+ Misses       9561     9541      -20     
- Partials     2978     2984       +6     

Flag	Coverage Δ
unittests	73.59% <ø> (+0.02%)	⬆️

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[CabinfeverB]

No need to add HTTP scheme prefix

[rleungx]

/merge

[ti-chi-bot]

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/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: eb660b8

[ti-chi-bot]

@rleungx: Your PR was out of date, I have automatically updated it for you.

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