ci: add rust and sqlx-cli to mise tools

SQLx tests require sqlx-cli for running migrations.
mise will install these tools in CI via mise install.

Author: tobyhede

mise.toml

@@ -6,6 +6,12 @@
 #     "./tests/mise.tcp.toml",
 #     "./tests/mise.tls.toml",
 # ]
+
+[tools]
+# Required for SQLx tests
+rust = "latest"
+"cargo:sqlx-cli" = "latest"
+
 [task_config]
 includes = [
   "tasks",