In WT-12986 function naming changed where functions used across WiredTiger directories/sub-systems retain the __wt_ function naming convention.

Functions that are used across files but within a single sub-directory now use __wti_ as the function name prefix.

This ticket is to create a script in dist run by s_all to confirm:

1. That all functions in a source file beginning with wti are only used or called by other files within that directory.
2. That all functions in a source file beginning with wti are used in at least two files within that directory.
3. That all functions in a source file beginning with wt_ are used somewhere outside of that directory. Typically it would be another directory but could be from some of the include/*_inline.h header files.