Fix Issue 17161 - Revert all changes to std.regex from 2.072.2 onwards

Author: JackStouffer

posix.mak

@@ -193,7 +193,7 @@ PACKAGE_std_experimental_ndslice = package iteration selection slice
 PACKAGE_std_net = curl isemail
 PACKAGE_std_range = interfaces package primitives
 PACKAGE_std_regex = package $(addprefix internal/,generator ir parser \
-  backtracking bitnfa tests tests2 tests3 thompson shiftor)
+  backtracking tests thompson kickstart)
 
 # Modules in std (including those in packages)
 STD_MODULES=$(call P2MODULES,$(STD_PACKAGES))