BaseTools: Resolve regex syntax warnings

Switches regex patterns to raw text to resolve python 3.12 syntax
warnings in regards to invalid escape sequences, as is suggested by the
re (regex) module in python.

Cc: Rebecca Cran <rebecca@bsdio.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Yuwei Chen <yuwei.chen@intel.com>
Signed-off-by: Joey Vagedes <joey.vagedes@gmail.com>
Reviewed-by: Rebecca Cran <rebecca@bsdio.com>

BaseTools/Source/Python/AutoGen/WorkspaceAutoGen.py

@@ -26,7 +26,7 @@ from Common.Misc import *
 import json
 
 ## Regular expression for splitting Dependency Expression string into tokens
-gDepexTokenPattern = re.compile("(\(|\)|\w+| \S+\.inf)")
+gDepexTokenPattern = re.compile(r"(\(|\)|\w+| \S+\.inf)")
 
 ## Regular expression for match: PCD(xxxx.yyy)
 gPCDAsGuidPattern = re.compile(r"^PCD\(.+\..+\)$")