all: upgrade go directive to at least 1.24.0 [generated]

By now Go 1.25.0 has been released, and Go 1.23 is no longer supported
per the Go Release Policy (see https://go.dev/doc/devel/release#policy).

For golang/go#69095.

[git-generate]
(cd example/ivy && go get go@1.24.0 && go mod tidy && go fix ./... && go mod edit -toolchain=none)
(cd . && go get go@1.24.0 && go mod tidy && go fix ./... && go mod edit -toolchain=none)

Change-Id: I8ffd5cb5db1f3551a42787652d09b11a0f75c5c6
Reviewed-on: https://go-review.googlesource.com/c/mobile/+/695418
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>

example/ivy/go.mod

@@ -1,6 +1,6 @@
 module golang.org/x/mobile/example/ivy
 
-go 1.23.0
+go 1.24.0
 
 require (
 	golang.org/x/mobile v0.0.0-20250711185624-d5bb5ecc55c0

go.mod

@@ -1,6 +1,6 @@
 module golang.org/x/mobile
 
-go 1.23.0
+go 1.24.0
 
 // The modern go/types type checker produces types.Alias
 // types for the explicit representation of type aliases.