Open Policy Agent - v0.63.0

This release contains a mix of features, performance improvements, and bugfixes.

cmd/exec: Add --timeout flag to opa exec to prevent infinite hangs. (#6613) authored by @philipaconrad
download: Surface bundle download errors via debug logging (#6609) authored by @ashutosh-narkar reported by @nevumx
topdown: Fixing overactive Early Exit suppression (#6566) authored by @johanfylling reported by @ashwinhb
plugins/rest: Add support to get temp creds via AssumeRole (#6634) authored by @ashutosh-narkar

topdown: Adding a new crypto.x509.parse_and_verify_certificates_with_options built-in function. (#5882) authored by @yogisinha reported by @IxDay
format: Preserve brackets around set union operation (#6588) authored by @ashutosh-narkar reported by @HarshPathakhp
aws: Support for Unsigned Payload or provided content sha256 in AWS signing (#6581) authored by @prasanthj

ADOPTERS.md: Add Facets.cloud to the list (#6640) authored by @ashutosh-narkar reported by @samarthya-gupta1
docs: Mention homebrew install option (#6622) authored by @anderseknert
docs: Add Rego v1 keywords to list of reserved names (#6649) authored by @anderseknert
docs: Add Tunnelmole as an open source tunneling option in the Cloudformation hooks documentation (#6626) authored by @robbie-cahill
docs: Add docs on using env vars in place of CLI flags (#6631) authored by @anderseknert
docs: Adding integration for Backstage (#6629) authored by @Parsifal-M
docs: Clear up some uses of future keywords (#6653) authored by @charlieegan3
docs: Update delta bundle patch doc for remove op (#6645) authored by @0marq
docs: Fix typo in Debugging OPA (#6637) authored by @setchy

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