[Feature](bangc-ops): add Sybn op.

[yuer-cn]

Thanks for your contribution and we appreciate it a lot. 🚀🚀

1. Motivation

将sybn6个小算子以二进制形式合入mluops。

2. Modification

增加算子sync_batch_norm_backward_elemt，sync_batchnorm_backward_elemt_v2，sync_batchnorm_backward_reduce，
sync_batchnorm_elemt，sync_batchnorm_gather_stats_with_counts，sync_batchnorm_stats。

3. Test Report

If you want to know how to do operator testing, you can see GTest-User-Guide-zh.

3.1 Modification Details

3.1.1 Accuracy Acceptance Standard

For static threshold standard details, see: MLU-OPS Accuracy Acceptance Standard.

• static threshold
  • diff1
    • float32 mlu diff1 <= 3e-3
    • float16 mlu diff1 <= 3e-3
  • diff2
    • float32 mlu diff2 <= 3e-3
    • float16 mlu diff2 <= 3e-3

3.1.2 Operator Scheme checklist

• Supported hardware
  • MLU370
  • MLU590
• Job types
  • BLOCK
  • UNION1
  • UNION2
  • UNION4
  • The operator will dynamically select the most suitable task type, for example, UNION8

3.2 Accuracy Test

3.2.1 Accuracy Test

If you have checked the following items, please tick the relevant box.

• Data type test (e.g. float32/int8)
• Multi-dimensional tensor test
• Layout test
• Different size/integer remainder end segment/alignment misalignment test
• Zero dimensional tensor test/zero element test
• stability test
• Multiple platform test
• Gen_case module test, see: Gencase-User-Guide-zh
• Nan/INF tests
• Bug fix tests
• For memory leak check details, see: GTest-User-Guide-zh
• For code coverage check details, see: GTest-User-Guide-zh
• For I/O calculation efficiency check details, see: MLU-OPS-Performance-Acceptance-Standard

3.2.2 Parameter Check

Test Point-1: When a new operator is submitted, the test points are given and the test results are stated. Acceptance Standard: Normal error.

Please fill your test results(Error Message) in here, ...

Test Point-2: Whether illegal parameters are passed. Acceptance Standard: Normal error.

Test results...

3.3 Performance Test

See MLU-OPS Performance Acceptance Standard for details.

Platform：MLU370

[----------] Global test environment tear-down
[ SUMMARY  ] Total 8 cases of 6 op(s).
ALL PASSED.
[==========] 8 test cases from 6 test suites ran. (2229 ms total)
[  PASSED  ] 8 test cases.

Platform：MLU590

[----------] Global test environment tear-down
[ SUMMARY  ] Total 8 cases of 6 op(s).
ALL PASSED.
[==========] 8 test cases from 6 test suites ran. (2905 ms total)
[  PASSED  ] 8 test cases.

3.4 Summary Analysis

Please give a brief overview here, if you want to note and summarize the content.