Kefu Chai 59579d5876 utils: fragment_range: specialize fmt::formatter<FragmentedView> ...

this is a part of a series to migrating from `operator<<(ostream&, ..)`
based formatting to fmtlib based formatting. the goal here is to enable
fmtlib to print classes fulfill the requirement of `FragmentedView` concept
without the help of template function of `to_hex()`, this function is
dropped in this change, as all its callers are now using fmtlib
for formatting now. the helper of `fragment_to_hex()` is dropped
as well, its only caller is `to_hex()`.

Refs scylladb#13245

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>

Closes #13471

2023-04-11 16:09:38 +03:00

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