Logs are rotated based on size, and exceeding a certain amount will result in log loss.

[JellyTony]

Describe the bug
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To Reproduce
Steps to reproduce the behavior, if applicable:

1. The code is

   MaxSize(1)

Rotation("size")

2. The error is

**Expected behavior**
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**Screenshots**
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**Environments (please complete the following information):**
- OS: [e.g. Linux]
- go-zero version [e.g. 1.2.1]
- goctl version [e.g. 1.2.1, optional]

**More description**
发现  size轮转的备份规则是 RFC3339，当在1s 内写入大量日志切发生轮转行为，就会丢日志，因为命名规则是按秒命名的