[perf] Caller data is still extracted when `AsyncAppender.includeCallerData = false` and layout contains `%C`, `%M` or `%L`

[leeychee]

When AsyncAppender.includeCallerData = false and layout contains %C, %M or %L:

1. Data extraction is skipped in business threads;
2. However, caller data is still extracted in the logback thread by AsyncAppenderBase.Worker;
3. Since the caller data is extracted from logback thread,%C, %M and %L all convert to ?;
4. This results in MEASURABLE CPU overhead if the system owner forgets to remove the %C, %M or %L from the layout.

// Pass
@Test
public void settingNotIncludeCallerDataPropertyCausedCallerDataToBeNotIncluded() {
    asyncAppender.addAppender(listAppender);
    asyncAppender.setIncludeCallerData(false);
    asyncAppender.start();
    ILoggingEvent event = builder.build(diff);
    asyncAppender.doAppend(event);
    asyncAppender.stop();
    assertFalse(event.hasCallerData());
}

// Fail
@Test
public void settingNotIncludeCallerDataPropertyCausedCallerDataToBeNotIncluded_withL() {
    PatternLayoutEncoder patternLayoutEncoder = new PatternLayoutEncoder();
    patternLayoutEncoder.setContext(loggerContext);
    patternLayoutEncoder.setPattern("%L");
    patternLayoutEncoder.start();

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    OutputStreamAppender<ILoggingEvent> outputStreamAppender = new OutputStreamAppender<>();
    outputStreamAppender.setContext(loggerContext);
    outputStreamAppender.setName("oss");
    outputStreamAppender.setEncoder(patternLayoutEncoder);
    outputStreamAppender.setOutputStream(baos);
    outputStreamAppender.start();

    asyncAppender.addAppender(outputStreamAppender);
    asyncAppender.setIncludeCallerData(false);
    asyncAppender.start();

    ILoggingEvent event = builder.build(diff);
    asyncAppender.doAppend(event);
    asyncAppender.stop();

    assertFalse(event.hasCallerData());
}