SmallRyeCurrentThreadContextInterceptor: skip processing overhead when CP is disabled

[Sanne]

No description provided.

[FroMage]

OK, so what I said was bullshit:

     * {@link ThreadContext#ALL_REMAINING} is automatically appended to the
     * set of cleared context if neither the {@link #propagated} set nor the
     * {@link #unchanged} set include {@link ThreadContext#ALL_REMAINING}.

It's slightly more complex than what I claimed, so your initial change was better, even though it didn't account for crazy people listing every damn context in unchanged. Sorry about that :(

[Sanne]

NP 👍 replaced with the original commit.