refactor: make get_abs_path non-generic

Generic functions compile into multiple implementations,
increasing number of lines for LLVM to process,
code size and compilation times.

src/contact.rs

@@ -5,7 +5,7 @@ use std::collections::BinaryHeap;
 use std::convert::{TryFrom, TryInto};
 use std::fmt;
 use std::ops::Deref;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::time::{SystemTime, UNIX_EPOCH};
 
 use anyhow::{bail, ensure, Context as _, Result};
@@ -1186,7 +1186,7 @@ impl Contact {
             }
         } else if let Some(image_rel) = self.param.get(Param::ProfileImage) {
             if !image_rel.is_empty() {
-                return Ok(Some(get_abs_path(context, image_rel)));
+                return Ok(Some(get_abs_path(context, Path::new(image_rel))));
             }
         }
         Ok(None)