chore(php): update to new client surface (#7987)

* docs: Update docs for FraudPrevention field in CreateAssessment
docs: challenge is also returned for INVISIBLE keys
PiperOrigin-RevId: 712539647
Source-Link: googleapis/googleapis@3cef095
Source-Link: googleapis/googleapis-gen@a1274bb
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* chore(php): update to new client surface
PiperOrigin-RevId: 713324443
Source-Link: googleapis/googleapis@2dee81b
Source-Link: googleapis/googleapis-gen@5afbff2
Copy-Tag: eyJwIjoiUmVjYXB0Y2hhRW50ZXJwcmlzZS8uT3dsQm90LnlhbWwiLCJoIjoiNWFmYmZmMmI2N2NlNTU5MmIyNGQ1OGNkMWVlNzRiOWZjMmI2OTE3NyJ9