feat: add a label take precedence argument

[jebabin]

This PR add an argument to have labels take precedence over arguments.
By default watchtower have argument taking precedence over label which is not very convenient because arguments are global while label specific to container.
This is useful to allow specific container to be updated when monitor only is set to true
it close #1745
Test has been added to ensure that container are updated when monitor only is global set to true but set to false on the container level.
Documentation has been updated to include this new argument.
Additionally documentation has been updated to better describe the label enable argument which not only disable update but also disable monitoring

[github-actions]

Congratulations on opening your first pull request! We'll get back to you as soon as possible. In the meantime, please make sure you've updated the documentation to reflect your changes and have added test automation as needed. Thanks! 🙏🏼

[piksel]

Thanks for helping out with this!

[codecov]

Codecov Report

Patch coverage: 88.88% and project coverage change: +0.43% 🎉

Comparison is base (36391b0) 67.60% compared to head (2d1d8e7) 68.03%.
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1754      +/-   ##
==========================================
+ Coverage   67.60%   68.03%   +0.43%     
==========================================
  Files          26       26              
  Lines        2380     2387       +7     
==========================================
+ Hits         1609     1624      +15     
+ Misses        672      664       -8     
  Partials       99       99              

Files Changed	Coverage Δ
pkg/container/client.go	49.47% <0.00%> (ø)
pkg/container/container.go	55.72% <87.50%> (+3.17%)	⬆️
internal/actions/update.go	70.21% <100.00%> (-0.16%)	⬇️
internal/flags/flags.go	85.37% <100.00%> (+0.16%)	⬆️
pkg/container/metadata.go	68.00% <100.00%> (+10.10%)	⬆️

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[piksel]

I made a generalised helper to implement the logic, to make it easier to visually understand the logic/flow:

func (c Container) getContainerOrGlobalBool(globalVal bool, label string, contPrecedence bool) bool {
	if contVal, err := c.getBoolLabelValue(label); err != nil {
		if !errors.Is(err, errorLabelNotFound) {
			logrus.WithField("error", err).WithField("label", label).Warn("Failed to parse label value")
		}
		return globalVal
	} else {
		if contPrecedence {
			return contVal
		} else {
			return contVal || globalVal
		}
	}
}

Are you OK with me pushing this? I can also add some more tests to increase the coverage.

[jebabin]

Of course I'm, this is clearly better