Update Helm Controller & Source Controller to the latest versions

[eak13]

Problem description (if applicable)
In an effort to keep Airship current with the latest updates of its supporting components, upgrade Helm Controller & Source Controller to the latest supported versions. We are currently on v0.4.3 for Helm Controller & v0.5.3 of the Source Controller. As part of this effort, we also want to understand the impacts to upgrading Helm Controller & Source Controller in an existing site.

Helm Controller

• https://github.com/fluxcd/helm-controller > latest as of issue creation v0.11.1
• https://github.com/fluxcd/helm-controller/releases

Source Controller

• https://github.com/fluxcd/source-controller > latest as of issue creation v0.15.3
• https://github.com/fluxcd/source-controller/releases

Proposed change

• Update Helm Controller to the latest version for greenfield deployments
• Update Source Controller to the latest version for greenfield deployments
• Ensure any version dependencies between Helm & Source Controllers are met
• Address any breaking changes from the updates
• In an existing site, upgrade Helm & Source Controllers to a new version. Document any impacts to the existing site.

[eak13]

This may need to be split into 2 issues: 1 for the updates & 1 for upgrading in Brownfield scenario. Will leave as one for now.

[seaneagan]

https://review.opendev.org/c/airship/airshipctl/+/800307

[seaneagan]

there should be no special brownfield impacts to updating these components as far as i am aware. once the CRDs transition from beta to GA, there will be a one time migration process that we would need to implement.

[seaneagan]

Patchset merged