Increment package versions to 3.0.0 (#19097)

This increments the package versions to 3.0.0.dev as the next stable
release will be 3.0.0. Nighly releases will be versioned as 3.0.0rc2024*
until then.
diff --git a/compiler/version.json b/compiler/version.json
index 794a2de..85afb41 100644
--- a/compiler/version.json
+++ b/compiler/version.json
@@ -1,3 +1,3 @@
 {
-  "package-version": "2.9.1.dev"
+  "package-version": "3.0.0.dev"
 }
diff --git a/runtime/version.json b/runtime/version.json
index 794a2de..85afb41 100644
--- a/runtime/version.json
+++ b/runtime/version.json
@@ -1,3 +1,3 @@
 {
-  "package-version": "2.9.1.dev"
+  "package-version": "3.0.0.dev"
 }