Fix error message when sent HTTP GET to RPC

[chenyukang]

What problem does this PR solve?

After RPC framework changed, if we sent an GET request to RPC endpoint, the error message has changed to:

Missing request extension: Extension of type `jsonrpc_utils::stream::StreamServerConfig` was not found. Perhaps you forgot to add it? See `axum::Extension`.%

Let's keep the same message with the old version.

Issue Number: close #4309

Problem Summary:

What is changed and how it works?

Add a special handler for RPC endpoint, distinguished from the Websockets configuration.

What's Changed:

Related changes

• PR to update owner/repo:
• Need to cherry-pick to the release branch

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code ci-runs-only: [ quick_checks,linters ]

Side effects

• Performance regression
• Breaking backward compatibility

Release note

Title Only: Include only the PR title in the release note.

[eval-exec]

If enable_websocket is set to true, will the client side receive the error message Used HTTP Method is not allowed. POST or OPTIONS is required when sending a GET HTTP request?

[chenyukang]

no, it's only for HTTP endpoint.
but the error message for Websocket still have a difference, for request like this send to port 28114 (Websocket port):

curl -s -X GET http://127.0.0.1:28114  -H 'Content-Type: application/json' -d '{ "id": 42,   "jsonrpc": "2.0", "method": "get_raw_tx_pool", "params": [] }

the old:

WebSocket Protocol Error: Unable to parse WebSocket key.%

now:

Connection header did not include 'upgrade'%

I think it's not necessary to fix it.

[chenyukang]

Another weird special issue, maybe we need to compatible with old version,

send request to ping, it will always return pong as health checkpoint.

curl -s -X GET http://127.0.0.1:8114/ping  -H 'Content-Type: application/json' -d '{ "id": 42,   "jsonrpc": "2.0", "method": "get_raw_tx_pool", "params": [] }'
pong%

I add another commit to make new RPC works as before, @eval-exec please re-approve.