feat(eventarc/publishing): promote to GA (#8308)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 549868874

Source-Link: https://togithub.com/googleapis/googleapis/commit/02aeb715005c633115bc77d563d6920731c98189

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/e308933094c803964d1704ffa448ac2bbfd5df22
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BEGIN_NESTED_COMMIT
feat(kms): add interoperable symmetric encryption system

PiperOrigin-RevId: 549699686

Source-Link: https://togithub.com/googleapis/googleapis/commit/68e699a6d7c764d9be0d92de22a9b009b6a6abff

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/f2314eb25d07b6a95a85999cfca8bbda6848d204
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END_NESTED_COMMIT
BEGIN_NESTED_COMMIT
feat(servicedirectory): added network and uid fields in Endpoint message
feat: added uid field to Namespace message
feat: added uid field to Service message
feat: enable Location methods
docs: updated docs for ResolveServiceRequest message
docs: updated docs for ListServicesRequest and ListEndpointsRequest message

PiperOrigin-RevId: 549683092

Source-Link: https://togithub.com/googleapis/googleapis/commit/c661ee0ec7aa53e87fa14033c8e9e3689b830021

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/e3c7b0298a532a7101d2ae8ec1dc0a0e2cfbb2c5
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END_NESTED_COMMIT
BEGIN_NESTED_COMMIT
feat(video/livestream): added support for slate events which allow users to create and insert a slate into a live stream to replace the main live stream content
feat: added a new asset resource which can be used as the content of slate events
feat: added a new pool resource for protecting input endpoints within a VPC Service Controls perimeter

PiperOrigin-RevId: 549682971

Source-Link: https://togithub.com/googleapis/googleapis/commit/e43e3d650ec81de8e69be745766744f58f0c78b2

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/47b82671ba10862a68df4c11a978131c2c92124c
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END_NESTED_COMMIT

internal/.repo-metadata-full.json

@@ -996,7 +996,7 @@
     "language": "go",
     "client_library_type": "generated",
     "client_documentation": "https://cloud.google.com/go/docs/reference/cloud.google.com/go/eventarc/latest/publishing/apiv1",
-    "release_level": "preview",
+    "release_level": "stable",
     "library_type": "GAPIC_AUTO"
   },
   "cloud.google.com/go/filestore/apiv1": {