The order of `access_log` handler settings may not be the best.

*Title*: *The order of `access_log` handler settings may not be the best*

Description
====

Now `access_log` is always runs before each filter log phase of HTTP, which will cause some operations in the log phase of http filter to not take effect in the access_log handler.
Forexample, if the metadata `xxx :yy` is set in the log phase of HTTP filter, then `%DYNAMIC_METADATA(xxx :yy)%` in access_log format does not work.

Analysis
====

`access_log` is registered at the [ActiveStream](https://github.com/envoyproxy/envoy/blob/main/source/common/http/conn_manager_impl.cc#L593).

```
ConnectionManagerImpl::ActiveStream::ActiveStream(ConnectionManagerImpl& connection_manager,
uint32_t buffer_limit) {
……
for (const AccessLog::InstanceSharedPtr& access_log : connection_manager_.config_.accessLogs()) {
filter_manager_.addAccessLogHandler(access_log);
}
……
}

```

each filter log handler of HTTP is registered at the [decodeHeaders](https://github.com/envoyproxy/envoy/blob/main/source/common/http/conn_manager_impl.cc#L999).
```
void ConnectionManagerImpl::ActiveStream::decodeHeaders(RequestHeaderMapPtr&& headers,
bool end_stream) {
……
const bool upgrade_rejected = filter_manager_.createFilterChain() == false; // will call filter_manager_.addAccessLogHandler
……
}
```

The log handler is registered using [push_back](https://github.com/envoyproxy/envoy/blob/main/source/common/http/filter_manager.cc#L470), So it means FIFO.
```
void FilterManager::addAccessLogHandler(AccessLog::InstanceSharedPtr handler) {
access_log_handlers_.push_back(handler);
}
```

So the `access_log` handler will be called first during the log phase.

```
void ConnectionManagerImpl::doDeferredStreamDestroy(ActiveStream& stream) {
……
stream.completeRequest();
stream.filter_manager_.onStreamComplete();

stream.filter_manager_.log(); // access_log and http_filter_log handler will be called here

stream.filter_manager_.destroyFilters();
……
}

void log() {
……
for (const auto& log_handler : access_log_handlers_) { // access_log handler will be called first
log_handler->log(request_headers, response_headers, response_trailers, stream_info_);
}
……
}
```

Expect
====
The `access_log` handler may be better to runs after all log handler of http filter.