[BUG] [Typescript-Angular] Regression basePath property is ignored

Description

I run the generator through the maven plugin with the following settings:

<configuration>
    <inputSpec>${project.build.directory}/openapi/api.yaml</inputSpec>
    <generatorName>typescript-angular</generatorName>
    <output>${project.basedir}/generated-sources</output>
    <configOptions>
        <fileNaming>kebab-case</fileNaming>
        <ngVersion>19.0.0</ngVersion>
        <npmName>***redacted***</npmName>
        <npmVersion>19.0.0</npmVersion>
        <npmRepository>*****redacted***
        </npmRepository>
        <snapshot>true</snapshot>
    </configOptions>
    <additionalProperties>basePath=</additionalProperties>
</configuration>

openapi-generator version

Up to version 7.12.0 this sets the basePath in the generated code to an empty string. As of 7.13 this seems to be ignored and the basePath is set to http://localhost.

Start with the typescript-angular generator's basePath and additionalProperties handling, using the Maven plugin configuration in the report as the reproduction entry point. Compare generated output from versions 7.12.0 and 7.13; the work is done when basePath= again produces an empty base path rather than http://localhost.