bugfix: fix cache scheduled refresh issue.

[wuwen5]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

Restore some code and fix cache scheduled refresh issue.

Ⅱ. Does this pull request fix one issue?

fixes #6660

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[funky-eyes]

我认为应该将take改为poll，加上超时时间就可以了，不需要独立一个线程去处理这个刷新缓存时间，你觉得呢？
I think we should change "take" to "poll" and add a timeout, that should be enough. We don't need a separate thread to handle the cache refresh time. What do you think about that?

[wuwen5]

我认为应该将take改为poll，加上超时时间就可以了，不需要独立一个线程去处理这个刷新缓存时间，你觉得呢？ I think we should change "take" to "poll" and add a timeout, that should be enough. We don't need a separate thread to handle the cache refresh time. What do you think about that?

OK， Good idea

[wuwen5]

@funky-eyes
已经修改，同时我将currentTimeMillis改为了nanoTime,因为计算时间流逝应该使用单调时间而不是挂钟时间，避免时钟回拨问题.

It has been modified, and at the same time, I have changed the currentTimeMillis to nanoTime because calculating the passage of time should use monotonic time instead of clock time to avoid clock back issues.

[funky-eyes]

LGTM
麻烦在changelog中找到中英两版语言的2.x.md在其中将该pr登记，并登记你的github信息

[funky-eyes]

请把你的钉钉联系方式发送至：jianbin@apache.org 我将邀请你加入seata开发者群中
Please send me your DingTalk contact information to jianbin@apache.org. I will invite you to join the Seata developers group.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 50.77%. Comparing base (933b492) to head (5b965de).
Report is 35 commits behind head on 2.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #6661      +/-   ##
============================================
- Coverage     51.13%   50.77%   -0.36%     
- Complexity     5317     5642     +325     
============================================
  Files           950     1023      +73     
  Lines         33448    35440    +1992     
  Branches       4048     4216     +168     
============================================
+ Hits          17103    17995     +892     
- Misses        14666    15644     +978     
- Partials       1679     1801     +122     

Files	Coverage Δ
...m/datasource/sql/struct/TableMetaCacheFactory.java	57.89% <33.33%> (+5.26%)	⬆️

... and 107 files with indirect coverage changes