Update quay.io/metallb/controller Docker tag to v0.14.7

This MR contains the following updates:

Package	Type	Update	Change
quay.io/metallb/controller		patch	v0.14.5 -> v0.14.7
quay.io/metallb/controller	ironbank-docker	patch	v0.14.5 -> v0.14.7
quay.io/metallb/controller	stage	patch	v0.14.5 -> v0.14.7

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Release Notes

metallb/metallb (quay.io/metallb/controller)

v0.14.7: v0.0.17

Compare Source

See the release notes for the details

https://metallb.universe.tf/release-notes/#version-0-14-7

v0.14.6: v0.0.16

Compare Source

See the release notes for the details

https://metallb.universe.tf/release-notes/#version-0-14-6

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Configuration

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