Switch to Edition 2024, more clippy lints, and less macro calls (#7200)

* Update to Rust 2024 Edition

Updated to the Rust 2024 Edition and added and fixed several lint checks.
This is a large change which, because of the extra lints, added some possible fixes for issues.

Signed-off-by: BlackDex <black.dex@gmail.com>

* Reorder and merge imports

Signed-off-by: BlackDex <black.dex@gmail.com>

* Remove "db_run!" macro calls where possible

Signed-off-by: BlackDex <black.dex@gmail.com>

---------

Signed-off-by: BlackDex <black.dex@gmail.com>

build.rs

@@ -1,5 +1,4 @@
-use std::env;
-use std::process::Command;
+use std::{env, io::Error, process::Command};
 
 fn main() {
     // These allow using e.g. #[cfg(mysql)] instead of #[cfg(feature = "mysql")], which helps when trying to add them through macros
@@ -42,13 +41,12 @@ fn main() {
     }
 }
 
-fn run(args: &[&str]) -> Result<String, std::io::Error> {
+fn run(args: &[&str]) -> Result<String, Error> {
     let out = Command::new(args[0]).args(&args[1..]).output()?;
     if !out.status.success() {
-        use std::io::Error;
         return Err(Error::other("Command not successful"));
     }
-    Ok(String::from_utf8(out.stdout).unwrap().trim().to_string())
+    Ok(String::from_utf8(out.stdout).unwrap().trim().to_owned())
 }
 
 /// This method reads info from Git, namely tags, branch, and revision
@@ -58,7 +56,7 @@ fn run(args: &[&str]) -> Result<String, std::io::Error> {
 ///    - `env!("GIT_BRANCH")`
 ///    - `env!("GIT_REV")`
 ///    - `env!("VW_VERSION")`
-fn version_from_git_info() -> Result<String, std::io::Error> {
+fn version_from_git_info() -> Result<String, Error> {
     // The exact tag for the current commit, can be empty when
     // the current commit doesn't have an associated tag
     let exact_tag = run(&["git", "describe", "--abbrev=0", "--tags", "--exact-match"]).ok();