Make getFilterJsonSchemaFor() model-aware

Currently, getFilterJsonSchemaFor() isn't model-aware.

This means that the openapi.json order filter parameter will be generic:

In the case above, it's the /todos parameter from the Todo example.

This would lead to issues where the suggested order filter isn't a valid query:

(Notice the "order": [ "string" ])

Steps to reproduce

A quick way to reproduce is use the Todo example:

lb4 example todo

This also applies to any LoopBack 4 application that utilises @param.filter(ModelHere).

Expected Behavior

The order filter should be model-aware and not generic.

Link to reproduction sandbox

lb4 example todo

Additional information

$ node -e 'console.log(process.platform, process.arch, process.versions.node)' && \
>   npm ls --prod --depth 0 | grep loopback
win32 x64 12.16.1
@loopback/example-todo@3.0.2 C:\Users\rifaa\Documents\loopback4-example-todo
+-- @loopback/boot@2.0.2
+-- @loopback/context@3.2.0
+-- UNMET PEER DEPENDENCY @loopback/core@2.2.0
+-- @loopback/openapi-v3@3.1.1
+-- UNMET PEER DEPENDENCY @loopback/repository@2.0.2
+-- @loopback/rest@3.1.0
+-- @loopback/rest-explorer@2.0.2
+-- @loopback/service-proxy@2.0.2
npm+-- loopback-connector-rest@3.6.0
 ERR! peer dep missing: @loopback/core@^1.12.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/repository@^1.16.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/core@^1.12.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/repository@^1.16.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/core@^1.12.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/repository@^1.16.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/core@^1.12.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/core@^1.12.0, required by @loopback/model-api-builder@2.0.2
npm ERR! peer dep missing: @loopback/core@^1.12.0, required by @loopback/model-api-builder@2.0.2

Related Issues

N/A

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