*: support cgroup with systemd (#48096)

[ti-chi-bot]

This is an automated cherry-pick of #48096

What problem does this PR solve?

Issue Number: close #47442

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

1、with systemd

run tidb-server

[Unit]
Description=tidb

[Service]
Type=simple
Restart=always
ExecStart=/usr/bin/tidb
StandardOutput=journal
MemoryMax=500M

[Install]
WantedBy=multi-user.target

you will see the log like this.

 [2023/10/30 11:00:49.325 +00:00] [INFO] [meminfo.go:188] ["use cgroup memory hook"] [cgroupMemorySize=524288000] [physicalMemorySize=32900468736]

2、without systemd

you will see.

[2023/10/30 10:47:16.154 +00:00] [INFO] [meminfo.go:190] ["use physical memory hook"] [cgroupMemorySize=9223372036854775807] [physicalMemorySize=32900468736]

• No need to test

  • I checked and no code files have been changed.

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

Please refer to Release Notes Language Style Guide to write a quality release note.

*: support cgroup with systemd

[ti-chi-bot]

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