✨ Add the liveness and readiness probe in the manager deployment

[prafull01]

Description
Add the liveness and readiness probe for the manager deployment.

Motivation
Fixes: #1761

[prafull01]

/cc @camilamacedo86

[prafull01]

/test pull-kubebuilder-e2e-k8s-1-17-0

[camilamacedo86]

I liked this one 🥇 . its motivations came from community requests made in SDK operator-framework/operator-sdk#4102. I pinged it in the slack as well for we get feedback from the community. Let's see.

[christopherhein]

Seems pretty low risk and a good addition to level up the base scaffolding. Before #1790 is done I'll need to make sure we don't change the 9443 port and the default health/ready endpoint paths.

lgtm!

[camilamacedo86]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[camilamacedo86]

I think it is fine to get merged so;
/lgtm

[estroz]

@prafull01 did you manually test this change? I don't think these endpoints are available by default.

[prafull01]

@estroz Hi Eric, I thought the following e2e scenario would cover the checking of controller-manager coming up:

kubebuilder/test/e2e/v3/e2e_suite.go

Line 168 in 7db6812

By("validate the controller-manager pod running as expected")