Update openpolicyagent/conftest Docker tag to v0.24.0

This MR contains the following updates:

Package	Type	Update	Change
openpolicyagent/conftest	ironbank-docker	minor	v0.23.0 -> v0.24.0
openpolicyagent/conftest		minor	v0.23.0 -> v0.24.0
openpolicyagent/conftest	stage	minor	v0.23.0 -> v0.24.0

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