Everywhere: Rename {Deprecated => Byte}String

This commit un-deprecates DeprecatedString, and repurposes it as a byte
string.
As the null state has already been removed, there are no other
particularly hairy blockers in repurposing this type as a byte string
(what it _really_ is).

This commit is auto-generated:
  $ xs=$(ack -l \bDeprecatedString\b\|deprecated_string AK Userland \
    Meta Ports Ladybird Tests Kernel)
  $ perl -pie 's/\bDeprecatedString\b/ByteString/g;
    s/deprecated_string/byte_string/g' $xs
  $ clang-format --style=file -i \
    $(git diff --name-only | grep \.cpp\|\.h)
  $ gn format $(git ls-files '*.gn' '*.gni')

Userland/Libraries/LibSQL/AST/Insert.cpp

@@ -37,7 +37,7 @@ ResultOr<ResultSet> Insert::execute(ExecutionContext& context) const
         auto values = row_value.to_vector().release_value();
 
         if (m_column_names.is_empty() && values.size() != row.size())
-            return Result { SQLCommand::Insert, SQLErrorCode::InvalidNumberOfValues, DeprecatedString::empty() };
+            return Result { SQLCommand::Insert, SQLErrorCode::InvalidNumberOfValues, ByteString::empty() };
 
         for (auto ix = 0u; ix < values.size(); ix++) {
             auto& tuple_descriptor = *row.descriptor();