try-runtime: dynamic storage query sizes (#13923)

* improve batch rpc error message

* wip aimd storage data fetch

* complete aimd function refactor

* make batch_request function async

* improve function name

* fix load_child_remote issue

* slight efficiency improvement

* improve logs and variable name

* remove redundant comment

* improve comment

* address pr comments

* Update utils/frame/remote-externalities/src/lib.rs

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

* simplify client handling

* fix type issue

* fix clippy issue

* try to trigger ci

* try to trigger ci

---------

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

substrate/utils/frame/remote-externalities/Cargo.toml

@@ -12,6 +12,7 @@ description = "An externalities provided environment that can load itself from r
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
+jsonrpsee = { version = "0.16.2", features = ["http-client"] }
 codec = { package = "parity-scale-codec", version = "3.2.2" }
 log = "0.4.17"
 serde = "1.0.136"
@@ -22,6 +23,7 @@ sp-runtime = { version = "7.0.0", path = "../../../primitives/runtime" }
 tokio = { version = "1.22.0", features = ["macros", "rt-multi-thread"] }
 substrate-rpc-client = { path = "../rpc/client" }
 futures = "0.3"
+async-recursion = "1.0.4"
 
 [dev-dependencies]
 frame-support = { version = "4.0.0-dev", path = "../../../frame/support" }