[BUG] [Core] ByteArray is marked as String at the same time

Created by: ityuhui

Bug Report Checklist

Have you provided a full/minimal spec to reproduce the issue?
Have you validated the input using an OpenAPI validator (example)?
Have you tested with the latest master to confirm the issue still exists?
Have you searched for related issues/PRs?
What's the actual output vs expected output?
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Description

I think some recent change of openapi-generator core breaks a behavior:

e.g.

        "data": {
          "additionalProperties": {
            "format": "byte",
            "type": "string"
          },

At before (on September 16, 2021), the data will be marked as "isString" : false, "isByteArray" : true, but today I found it will be marked as "isString" : true, "isByteArray" : true,

Could you please give me some suggestions/clues about this problem ? Thanks.

Involve @zhemant

openapi-generator version

master

OpenAPI declaration file content or url

Generation Details

java -DdebugModels -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate -i /path/swagger.json  -g c    -o ../output --skip-validate-spec > log.txt

Steps to reproduce

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/pull/10034