自定义的Resttemplate，无法被SentialResttemplate注解强化

[linzhiqiang0514]

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Which Component
Sentinel

Describe the bug
A clear and concise description of what the bug is.
当我使用自定义的RestTemplate时，com.alibaba.cloud.sentinel.custom.SentinelBeanPostProcessor#postProcessMergedBeanDefinition
判断逻辑错误，无法判断自定义的RestTemplate
if (beanName == null || beanType != RestTemplate.class) {

Simplest demo
The URL of the simplest demo to reproduce the problem.

public class CustomRestTemplate extends RestTemplate {
}

@bean("internalRestTemplate")
@LoadBalanced
@primary
@SentinelRestTemplate(fallbackClass = ExceptionUtil.class, fallback = "handleFallback",
blockHandler = "handleBlock",blockHandlerClass = ExceptionUtil.class)
public RestTemplate internalRestTemplate(
@Autowired @qualifier("restHttpClient") CloseableHttpClient httpClient,
PlatformHttpRequestInterceptor platformHttpRequestInterceptor,
PlatformResponseErrorHandler platformResponseErrorHandler) {
logger.info("SentinelPlatformRestTemplate开始!");

    CustomRestTemplate restTemplate = new CustomRestTemplate(
        new HttpComponentsClientHttpRequestFactory(httpClient));
    logger.info("SentinelPlatformRestTemplate创建成功!ClientInfo:{}", httpClient);
    return restTemplate;
}

To Reproduce
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2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Screenshots
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Additional context
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e.g. MacOS 、Java8 、 Version 0.2.1.RELEASE
version: 2022.0.0.0-RC2

[ruansheng8]

I willl fix it