chore(php): [Many APIs] promote GkeMultiCloud as stable (#7485)

chore(php): promote GkeMultiCloud as stable
chore(php): promote GSuiteAddOns as stable
chore(php): promote Run as stable
chore(php): promote StorageInsights as stable
chore(php): promote VideoLiveStream as stable
chore(php): promote VideoStitcher as stable
chore(php): promote VmwareEngine as stable

PiperOrigin-RevId: 647335803

Source-Link: googleapis/googleapis@740a723

Source-Link: googleapis/googleapis-gen@a665afb
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