Merge from v6.6.4 release (#1555)

* Revert "Migrate KTON DAO stuffs (#1532)"

This reverts commit 239a502.

* A more user-friendly test environment (#1540)

* Format

* A more user-friendly test environment

* Fix compile

* Support evm-tracing for the ethtx-forward (#1541)

* Support evm-tracing for the ethtx-forward

* Support other networks

* Fix CI

* Again for CI

* Format

* Format

---------

Co-authored-by: Xavier Lau <[email protected]>

* Align xcm configs (#1542)

* Fix `eth_call` and `estimate_gas` for older runtimes (#1546)

* Use biggiest proof_size_base_cost

* Upgrade frontier locked commit

* Update note

* Bump version

Signed-off-by: Xavier Lau <[email protected]>

---------

Signed-off-by: Xavier Lau <[email protected]>
Co-authored-by: Bear Wang <[email protected]>
Co-authored-by: Guantong <[email protected]>

Author: 3 people

.github/note-template/runtime.md

@@ -1,6 +1,6 @@
 ## {{ .Env.CHAIN | strings.Title }}
 <h3 align="right">Upgrade Priority HIGH :red_circle:</h3>
-<h3 align="center">!!All the nodes must be upgraded due to the new asynchronous backing feature!!</h4>
+<h4 align="center">!!All nodes need to be updated to this(`v6.6.4`) version prior to the upcoming `v6.6.5` release because of the new asynchronous backing feature!!</h4>
 
 #### Whitelist Hash
 ```