Avoid urldecode clientid twice

[HJianBo]

Fixes https://emqx.atlassian.net/browse/EMQX-9787 and https://emqx.atlassian.net/browse/EMQX-9783

Summary

🤖 Generated by Copilot at 26b69a5

This pull request improves the HTTP API for gateway clients and listeners, and adds more test cases for the MQTT-SN protocol. It changes the reply function to reply_and_update in emqx_mqttsn_channel.erl to update the client information after a subscription or unsubscription. It also removes redundant decoding of parameters in emqx_gateway_api_clients.erl and emqx_gateway_api_listeners.erl. It adds two test cases in emqx_sn_protocol_SUITE.erl to check the API for complex client ids and subscription updates.

PR Checklist

Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:

• Added tests for the changes
• Changed lines covered in coverage report
• Change log has been added to changes/{ce,ee}/(feat|perf|fix)-<PR-id>.en.md files
• For internal contributor: there is a jira ticket to track this change
• If there should be document changes, a PR to emqx-docs.git is sent, or a jira ticket is created to follow up
• Schema changes are backward compatible

Checklist for CI (.github/workflows) changes

• If changed package build workflow, pass this action (manual trigger)
• Change log has been added to changes/ dir for user-facing artifacts update

[coveralls]

Pull Request Test Coverage Report for Build 5012044246

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• 36 unchanged lines in 15 files lost coverage.
• Overall coverage decreased (-0.03%) to 81.781%

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Files with Coverage Reduction	New Missed Lines	%
apps/emqx_management/src/emqx_mgmt_util.erl	1	13.79%
apps/emqx/src/emqx_banned.erl	1	89.39%
apps/emqx/src/emqx_broker.erl	1	87.64%
apps/emqx/src/emqx_channel.erl	1	87.58%
apps/emqx/src/emqx_connection.erl	1	85.96%
apps/emqx/src/emqx_limiter/src/emqx_limiter_schema.erl	1	75.44%
apps/emqx/src/emqx_logger_textfmt.erl	1	59.09%
apps/emqx/src/emqx_os_mon.erl	1	91.55%
apps/emqx_bridge_sqlserver/src/emqx_bridge_sqlserver_connector.erl	2	81.19%
apps/emqx/src/emqx_alarm.erl	2	89.92%

Totals
Change from base Build 5011198897:	-0.03%
Covered Lines:	27095
Relevant Lines:	33131

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💛 - Coveralls

[yanzhiemq]

Bug Fixes

• Fixed the issue where the HTTP API interface of Gateway cannot handle ClientIDs with special characters, such as: !@#$%^&*()_+{}:"<>?/.

[yanzhiemq]

修复

• 修复了网关的 HTTP API 接口无法处理包含特殊字符的 ClientID 的问题，例如：!@#$%^&*()_+{}:"<>?/。