[clang-format] Revert breaking stream operators to previous default (#89016)

Reverts commit d68826dfbd98, which changes the previous default behavior
of always breaking before a stream insertion operator `<<` if both
operands are string literals.

Also reverts the related commits 27f547968cce and bf05be5b87fc.

See the discussion in #88483.

GitOrigin-RevId: 29ecd6d50f1400e3101f27567b535eb8af905f58
2 files changed