Release v6.64.0

What's Changed

• chore(constraints): re-point vendored tokenizer check at cdc tcl_tokenizer.py by @hernloh in #680
• fix(power): read the upstream run's blocks: abstracts (#679) by @hernloh in #681
• fix(pnr): keep standard cells off macro edges with a placement halo (#673) by @hernloh in #682

Full Changelog: v6.63.0...v6.64.0