[24.0 backport] cli/command/system: fix "docker events" not supporting --format=json

[thaJeztah]

• backport of cli/command/system: fix "docker events" not supporting --format=json #4530

Before this patch:

docker events --format=json
json
json
json
^C

With this patch:

docker events --format=json
{"status":"create","id":"4ac3bba8abd68961e627540fed81ad16d55b88e45629d7cdb792126d09b6488d","from":"hello-world","Type":"container","Action":"create","Actor":{"ID":"4ac3bba8abd68961e627540fed81ad16d55b88e45629d7cdb792126d09b6488d","Attributes":{"image":"hello-world","name":"dreamy_goldstine"}},"scope":"local","time":1693168508,"timeNano":1693168508190136885}
{"status":"attach","id":"4ac3bba8abd68961e627540fed81ad16d55b88e45629d7cdb792126d09b6488d","from":"hello-world","Type":"container","Action":"attach","Actor":{"ID":"4ac3bba8abd68961e627540fed81ad16d55b88e45629d7cdb792126d09b6488d","Attributes":{"image":"hello-world","name":"dreamy_goldstine"}},"scope":"local","time":1693168508,"timeNano":1693168508192851593}
{"Type":"network","Action":"connect","Actor":{"ID":"c54920dd5074a73e28bea62007e0334d81cc040a90372be311cf16806403d350","Attributes":{"container":"4ac3bba8abd68961e627540fed81ad16d55b88e45629d7cdb792126d09b6488d","name":"bridge","type":"bridge"}},"scope":"local","time":1693168508,"timeNano":1693168508212398802}
{"status":"start","id":"4ac3bba8abd68961e627540fed81ad16d55b88e45629d7cdb792126d09b6488d","from":"hello-world","Type":"container","Action":"start","Actor":{"ID":"4ac3bba8abd68961e627540fed81ad16d55b88e45629d7cdb792126d09b6488d","Attributes":{"image":"hello-world","name":"dreamy_goldstine"}},"scope":"local","time":1693168508,"timeNano":1693168508312969843}
^C

(cherry picked from commit 6dfdd1e)

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- Description for the changelog

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[codecov-commenter]

Codecov Report

Merging #4544 (fab55e1) into 24.0 (2fcff17) will increase coverage by 0.28%.
The diff coverage is 81.25%.

Additional details and impacted files

@@            Coverage Diff             @@
##             24.0    #4544      +/-   ##
==========================================
+ Coverage   59.29%   59.58%   +0.28%     
==========================================
  Files         288      288              
  Lines       24817    24817              
==========================================
+ Hits        14715    14786      +71     
+ Misses       9220     9145      -75     
- Partials      882      886       +4