add controller name interface to all controllers

[OliverMKing]

Description

Adds controller name interface to all controllers. Allows for us to enforce consistent logging and metric naming for all controllers. Will be useful for alerting based on prometheus especially. If an alert fires we can attach an automatically generated query that can search relevant controller logs for that alert.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Unit and e2e tested

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[OliverMKing]

/ok-to-test sha=dc2e802

[coveralls]

Pull Request Test Coverage Report for Build 5966036453

• 28 of 35 (80.0%) changed or added relevant lines in 13 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.2%) to 89.537%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controller/dns/external_dns.go	1	2	50.0%
pkg/controller/controllername/controllername.go	12	18	66.67%

Totals
Change from base Build 5963965196:	-0.2%
Covered Lines:	1857
Relevant Lines:	2074

---

💛 - Coveralls

[OliverMKing]

/ok-to-test sha=d397a9a

[OliverMKing]

/ok-to-test sha=d9ef721

[Marcus-Hines]

LGTM

[jaiveerk]

very clean, lgtm

[davidgamero]

lgtm