chore: refactor the status/condition updating into an interface with functions

[diranged]

This change begins refactoring the reconciler code. The existing reconciler code makes heavy use of embedded structs to mimic an inheritance model. Go doesn't have an inheritance model, and generally discourages this in favor of interfaces.

This code moves the updateStatus, updateCondition, setReadyStatus and refetch methods out of the BaseReconciler{} struct and into their own packages where they are pure functions. These functions work by checking that the objects passed in match the hasStatusReconciler interface.

The ultimate goal is to create generic RequestReconciler and TemplateReconciler controllers that can be configured dynamically on startup to decide which custom resources they are monitoring for, and which IBuilder is used for them. This pattern will make it simpler to add in our own custom controllers in the future, or even support a pluggable controller model.

Note: The naming of hasStatusReconciler is ugly - but it's a private interface so we can refactor it any time once we have a better name.

[coveralls]

Pull Request Test Coverage Report for Build 3699328265

• 131 of 196 (66.84%) changed or added relevant lines in 11 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.7%) to 44.125%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/api/v1alpha1/condition_types.go	0	2	0.0%
internal/controllers/base_request_controller.go	83	85	97.65%
internal/controllers/internal/status/update_status.go	15	18	83.33%
internal/controllers/pod_access_request_controller.go	14	18	77.78%
internal/controllers/internal/status/update_condition.go	0	17	0.0%
internal/controllers/exec_access_request_controller.go	0	18	0.0%
internal/controllers/internal/status/set_ready_status.go	0	19	0.0%

Files with Coverage Reduction	New Missed Lines	%
internal/controllers/exec_access_request_controller.go	1	0%

Totals
Change from base Build 3698939000:	-0.7%
Covered Lines:	860
Relevant Lines:	1949

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💛 - Coveralls