Some more o3tl::starts/ends_with overloads

...including ones with a rest out parameter, modeled after their O(U)String
counterparts and not present in any C++ standard (so intended to stay in o3tl,
even when the C++20 wrappers are eventually removed again).  Plus test code.

These additional overloads will be used in forthcoming commits changing more
places to use std string_view.

Change-Id: Ifd05e0fdcb93e8751da22b8e4a59796ad00fe581
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122407
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions