feat: enhance admin api filter

[bzp2010]

Description

Added filter enhancements to the Admin API, allowing routes and stream routes to be filtered by service_id and upstream_id.

This is mainly used to enhance the APISIX dashboard.

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[SkyeYoung]

one question: can we adjust to use the format a[b]=c&a[d]=e? It seems more common. https://www.npmjs.com/package/qs

[bzp2010]

There is no existing API for parsing query strings for such objects in OpenResty, so it may have to use regular expressions to do so.
I don't want to do that right now. The existing format can be implemented in any language client, it's nothing more than a URI-encoded string.

ngx.log(ngx.ERR, require("cjson").encode(ngx.decode_args("filter%5Bservice_id%5D=a&filter%5Bservice_id%5D=b&b=c&c=c")))

[lua] test.lua:1: {"filter[service_id]":["a","b"],"b":"c","c":"c"}

[bzp2010]

It's too complicated to support something like this.

[kayx23]

docs LGTM

[juzhiyuan]

LGTM