Refactor some elemental package methods to be used as stand alone functions

[davidcassany]

This PR refactors some methods in elemental package. Basically it turns some of the methods in to static functions not tied to any object.

This is to allow reusing them without the need of an Elemental object. In fact I am also wondering of running a follow up PR completely removing the Elemental object from

elemental-toolkit/pkg/elemental/elemental.go

Lines 33 to 35 in a7b7f2e

	type Elemental struct {
	config *v1.Config
	}

as this is a useless object. In only keeps the configuration which is anyway already available in all places where the elemental package is in use. So in a follow up PR I would even consider dropping the object entirely and simply pass the configuration struct as a parameter.

Part of #1874

[codecov-commenter]

Codecov Report

Attention: 20 lines in your changes are missing coverage. Please review.

Comparison is base (a7b7f2e) 72.53% compared to head (9b47490) 72.49%.

Files	Patch %	Lines
pkg/elemental/elemental.go	80.61%	14 Missing and 5 partials ⚠️
pkg/action/install.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1883      +/-   ##
==========================================
- Coverage   72.53%   72.49%   -0.04%     
==========================================
  Files          69       69              
  Lines        7286     7283       -3     
==========================================
- Hits         5285     5280       -5     
- Misses       1622     1625       +3     
+ Partials      379      378       -1     

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[frelon]

LGTM