Update solr Docker tag to v9.7.0

This MR contains the following updates:

Package	Type	Update	Change
solr		minor	9.6.1 -> 9.7.0
solr	ironbank-docker	minor	9.6.1-slim -> 9.7.0-slim
solr	stage	minor	9.6.1-slim -> 9.7.0-slim

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