[BOLT] Support building runtime library if map_files is not readable #77822
Description
06b8057 introduced a check that prevents runtime library from being built if map_files is not available at configuration time.
However, BOLT has an option -instrumentation-binpath <path-to-instrumented-binary> that can be used if map_files is not available.
The proper solution is perhaps to emit a warning that map_files is not readable and suggest using -instrumentation-binpath option.