Fix regex for scope name specification
Fix regex for scope name specification

This PR tries to address the issue raised in 39019 where
regex for scope name does not capture `\` symbol.
```
VALID_OP_NAME_REGEX = re.compile("^[A-Za-z0-9.][A-Za-z0-9_.\\-/>]*$")
_VALID_SCOPE_NAME_REGEX = re.compile("^[A-Za-z0-9_.\\-/>]*$")
```
The reason was:
1. `-` was placed in the middle and was incorrectly considered by python as a range.
2. `\\` was considered as escape by python, so only one `\` when `re` starts processing.

This PR moves `-` to the end, and prefix with `r` for the string:
```
VALID_OP_NAME_REGEX = re.compile(r"^[A-Za-z0-9.][A-Za-z0-9_.\\/>-]*$")
_VALID_SCOPE_NAME_REGEX = re.compile(r"^[A-Za-z0-9_.\\/>-]*$")
```

This PR fixes 39019.

Signed-off-by: Yong Tang <765086fe2e0c1f980161f127fec596800f327f62@outlook.com>

paolodedios/tensorflow,cxxgtxy/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,yongtang/tensorflow,Intel-Corporation/tensorflow,karllessard/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,gautam1858/tensorflow,paolodedios/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_saved_model,yongtang/tensorflow,tensorflow/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,petewarden/tensorflow,sarvex/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,yongtang/tensorflow,annarev/tensorflow,annarev/tensorflow,aam-at/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,freedomtan/tensorflow,frreiss/tensorflow-fred,gautam1858/tensorflow,davidzchen/tensorflow,aam-at/tensorflow,karllessard/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow,freedomtan/tensorflow,Intel-tensorflow/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,sarvex/tensorflow,Intel-tensorflow/tensorflow,aldian/tensorflow,gautam1858/tensorflow,sarvex/tensorflow,cxxgtxy/tensorflow,yongtang/tensorflow,aldian/tensorflow,gautam1858/tensorflow,paolodedios/tensorflow,davidzchen/tensorflow,aldian/tensorflow,karllessard/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_saved_model,paolodedios/tensorflow,Intel-Corporation/tensorflow,gautam1858/tensorflow,aldian/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,gautam1858/tensorflow,sarvex/tensorflow,aam-at/tensorflow,davidzchen/tensorflow,annarev/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,annarev/tensorflow,annarev/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow,Intel-tensorflow/tensorflow,aam-at/tensorflow,petewarden/tensorflow,cxxgtxy/tensorflow,davidzchen/tensorflow,aldian/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,frreiss/tensorflow-fred,Intel-Corporation/tensorflow,tensorflow/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow,petewarden/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Intel-Corporation/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,Intel-tensorflow/tensorflow,petewarden/tensorflow,frreiss/tensorflow-fred,Intel-Corporation/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,yongtang/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,cxxgtxy/tensorflow,yongtang/tensorflow,frreiss/tensorflow-fred,paolodedios/tensorflow,frreiss/tensorflow-fred,cxxgtxy/tensorflow,petewarden/tensorflow,frreiss/tensorflow-fred,freedomtan/tensorflow,aldian/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,paolodedios/tensorflow,cxxgtxy/tensorflow,Intel-tensorflow/tensorflow,annarev/tensorflow,aldian/tensorflow,petewarden/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,cxxgtxy/tensorflow,freedomtan/tensorflow,sarvex/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,davidzchen/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,sarvex/tensorflow,aam-at/tensorflow,yongtang/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow,frreiss/tensorflow-fred,paolodedios/tensorflow,tensorflow/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,sarvex/tensorflow,frreiss/tensorflow-fred,frreiss/tensorflow-fred,freedomtan/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,karllessard/tensorflow,cxxgtxy/tensorflow,paolodedios/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aldian/tensorflow,freedomtan/tensorflow,Intel-Corporation/tensorflow,paolodedios/tensorflow,aam-at/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-pywrap_saved_model,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,petewarden/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-experimental_link_static_libraries_once,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,gautam1858/tensorflow,Intel-Corporation/tensorflow,annarev/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,aam-at/tensorflow,karllessard/tensorflow,yongtang/tensorflow,petewarden/tensorflow,sarvex/tensorflow,davidzchen/tensorflow,karllessard/tensorflow,aam-at/tensorflow,annarev/tensorflow,Inte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