feat(aiplatform): add Persistent Resource reboot api call to v1beta1 (#9680)

- [ ] Regenerate this pull request now.

docs: A comment for field `service_account` in message `.google.cloud.aiplatform.v1beta1.ServiceAccountSpec` is changed

PiperOrigin-RevId: 620918445

Source-Link: https://togithub.com/googleapis/googleapis/commit/ca6f88460e505bd451d98454656644be06b39ab3

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/0dcaa72c1b428c60d47e957a011904a2dcd996d8
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMGRjYWE3MmMxYjQyOGM2MGQ0N2U5NTdhMDExOTA0YTJkY2Q5OTZkOCJ9

Author: gcf-owl-bot[bot]

aiplatform/apiv1beta1/aiplatformpb/persistent_resource.pb.go

@@ -4519,6 +4519,11 @@
                 "ListPersistentResources"
               ]
             },
+            "RebootPersistentResource": {
+              "methods": [
+                "RebootPersistentResource"
+              ]
+            },
             "SetIamPolicy": {
               "methods": [
                 "SetIamPolicy"
@@ -4599,6 +4604,11 @@
                 "ListPersistentResources"
               ]
             },
+            "RebootPersistentResource": {
+              "methods": [
+                "RebootPersistentResource"
+              ]
+            },
             "SetIamPolicy": {
               "methods": [
                 "SetIamPolicy"