Move manual_ok_or from pedantic to style

`manual_ok_or` covers the same case that were covered by
`option_map_or_err_ok` which is not deprecated. The latter was in the
"style" category. Also, the lint is machine applicable, and leads to
shorter and more readable code, so "style" is appropriate.

The only difference is that the η-expanded form of `Result::Ok()` was
not covered by `option_map_or_err_ok` while it is by `manual_ok_or`, so
the category change may expose some new occurrences.

Author: samueltardieu

clippy_lints/src/methods/mod.rs

@@ -2639,7 +2639,7 @@ declare_clippy_lint! {
     /// ```
     #[clippy::version = "1.49.0"]
     pub MANUAL_OK_OR,
-    pedantic,
+    style,
     "finds patterns that can be encoded more concisely with `Option::ok_or`"
 }