cp(v0.35.x): feat: invalidate SSM cache upon AMI deprecation (#7301)

[jmdeal]

Fixes #N/A

Description
Cherry-picks #7301

How was this change tested?
make test

Does this change impact docs?

• Yes, PR includes docs updates
• Yes, issue opened: #
• No

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[coveralls]

Pull Request Test Coverage Report for Build 11714758562

Details

• 124 of 153 (81.05%) changed or added relevant lines in 11 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.01%) to 78.151%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/fake/ssmapi.go	26	27	96.3%
pkg/controllers/controllers.go	0	2	0.0%
pkg/providers/amifamily/ami.go	15	17	88.24%
pkg/apis/v1/ec2nodeclass.go	15	18	83.33%
pkg/operator/operator.go	0	5	0.0%
pkg/controllers/providers/ssm/invalidation/controller.go	34	40	85.0%
pkg/apis/v1/zz_generated.deepcopy.go	0	10	0.0%

Totals
Change from base Build 11713839600:	-0.01%
Covered Lines:	5773
Relevant Lines:	7387

---

💛 - Coveralls

[rschalo]

LGTM