libstdc++: Move std::bitset test to correct directory
Moves a std::bitset test file to the correct directory in the libstdc++ testsuite.
A test file for std::bitset, lwg4294.cc, was moved to the correct directory within the libstdc++ testsuite. The test was initially added to an incorrect location and this commit moves it to align with other bitset tests under the 20_util/bitset/cons/ directory.
In Details
This change involves reorganizing the libstdc++ testsuite. The std::bitset tests are located under the testsuite/20_util/bitset directory. Files in testsuite are source files compiled by make check. This commit moves a test file to the directory where it logically belongs.
For Context
The C++ standard library (libstdc++) comes with a suite of tests to ensure that the library functions as expected. These tests are organized into directories based on the part of the library they test. This commit simply moves a test file for std::bitset to the correct directory, improving the organization of the test suite.