200 OK returned where 206 Partial Content expected

[Maldivia]

Describe the bug

Bug report for #37205 / #37213,

The 206 response code in ServerFileBodyHandler.sendFile is not always used if there is a Response already present in the context for instance from ResponseHandler.

I tried adding the below code to ServerFileBodyHandler.sendFile and it worked on my end, but it seem a bit hackish, so raising it as an issue here to get some people with better contextual knowledge to look if this approach is OK.

        Response response = ctx.getResponse().get();
        if (response instanceof ResponseImpl responseImpl) {
            responseImpl.setStatus(Response.Status.PARTIAL_CONTENT.getStatusCode());
        } else {
            ctx.setResponse(new LazyResponse.Existing(Response.fromResponse(response)
                    .status(Response.Status.PARTIAL_CONTENT.getStatusCode())
                    .build()));
        }

Expected behavior

No response

Actual behavior

No response

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

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Quarkus version or git rev

No response

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[quarkus-bot]

/cc @FroMage (resteasy-reactive), @stuartwdouglas (resteasy-reactive)