Update Flux

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/fluxcd/helm-controller (source)	minor	v1.4.5 -> v1.5.4
registry1.dso.mil/ironbank/fluxcd/kustomize-controller (source)	minor	v1.7.3 -> v1.8.4
registry1.dso.mil/ironbank/fluxcd/notification-controller (source)	minor	v1.7.5 -> v1.8.4
registry1.dso.mil/ironbank/fluxcd/source-controller (source)	minor	v1.7.4 -> v1.8.3

Complete MR checklist

Assignee

• Followed upgrade instructions outlined in docs/DEVELOPMENT_MAINTENANCE.md
• Update Docs with new/updated steps as needed
• Tested and Validated Changes made with supporting info like logs or screenshots from test pipelines

Add supporting info below

Reviewer only

• Tested and Validated changes

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Configuration

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This MR was automatically generated by Renovate Bot.

Closes #3143 (closed)

Upgrade Notices

Update your Flux CLI to the latest version possible based on available IB images. Note, if installing with homebrew on mac, use command brew upgrade fluxcd/tap/flux. This specific tap is needed to grab the latest version.

Package	Update	Change
registry1.dso.mil/ironbank/fluxcd/helm-controller (source)	minor	v1.4.5 -> v1.5.4
registry1.dso.mil/ironbank/fluxcd/kustomize-controller (source)	minor	v1.7.3 -> v1.8.4
registry1.dso.mil/ironbank/fluxcd/notification-controller (source)	minor	v1.7.5 -> v1.8.4
registry1.dso.mil/ironbank/fluxcd/source-controller (source)	minor	v1.7.4 -> v1.8.3