Update Ironbank

This MR contains the following updates:

Package	Update	Change
gluon	patch	0.5.14 -> 0.5.15
mimir-distributed (source)	minor	5.5.1 -> 5.6.0
minio-instance (source)	major	6.0.4-bb.4 -> 7.0.0-bb.4
registry1.dso.mil/ironbank/opensource/grafana/mimir (source)	minor	2.14.2 -> 2.15.1

Complete MR checklist

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• 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

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• Tested and Validated changes

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Upgrade Notices

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