🌱 Add CAPD control plane toleration

[benmoss]

What this PR does / why we need it:
Adds a toleration to the CAPD manager deployment so that it can run on control plane nodes. I was trying to self-host a cluster with CAPD and was surprised to see that this deployment's pods were unable to be scheduled because it doesn't tolerate running on the control plane nodes.

[vincepri]

Please retitle to avoid the use of the word master

[ncdc]

@benmoss even though the toleration key includes the word "master", would you mind adjusting the PR title, description and commit message to say "control plane" instead? Thanks!

[benmoss]

Yeah I was thinking this would just be updated when #3279 was fixed. I'll retitle though.

[vincepri]

/approve
/assign @ncdc
/milestone v0.3.x

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vincepri

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[ncdc]

/lgtm

[k8s-ci-robot]

@benmoss: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-cluster-api-make	bed682c	link	/test pull-cluster-api-make

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