all: release v1.35.0

Change-Id: Ic0597f57619ea1e1e0d9dc85f08f26fa7b2c3389
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/618195
Reviewed-by: Lasse Folger <lassefolger@google.com>
Reviewed-by: Nicolas Hillegeer <aktau@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

internal/version/version.go

@@ -51,9 +51,9 @@ import (
 //  10. Send out the CL for review and submit it.
 const (
 	Major      = 1
-	Minor      = 34
-	Patch      = 2
-	PreRelease = "devel"
+	Minor      = 35
+	Patch      = 0
+	PreRelease = ""
 )
 
 // String formats the version string for this module in semver format.