rust: Automatically generated Clippy fixes for the tools only

Clippy settings:

[workspace.lints.clippy]
cognitive_complexity = "warn"
dbg_macro = "warn"
debug_assert_with_mut_call = "warn"
doc_link_with_quotes = "warn"
doc_markdown = "warn"
empty_line_after_outer_attr = "warn"
empty_structs_with_brackets = "warn"
float_cmp = "warn"
float_cmp_const = "warn"
float_equality_without_abs = "warn"
missing_const_for_fn = "warn"
missing_errors_doc = "warn"
mod_module_files = "warn"
option_if_let_else = "warn"
similar_names = "warn"
suspicious_operation_groupings = "warn"
unused_self = "warn"
use_debug = "warn"
used_underscore_binding = "warn"
useless_let_if_seq = "warn"
wildcard_dependencies = "warn"
wildcard_imports = "warn"

Command used:

  $ cargo +nightly clippy --fix

Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

rust/pvattest/src/cmd/check/host_key.rs

@@ -86,14 +86,14 @@ pub struct HostKeyCheck<'a> {
 }
 
 impl<'a> HostKeyCheck<'a> {
-    pub fn new(check_enforced: bool, hash: Option<&'a Path>) -> Self {
+    pub const fn new(check_enforced: bool, hash: Option<&'a Path>) -> Self {
         Self {
             check_enforced,
             hash,
         }
     }
 
-    pub fn hide(&self) -> bool {
+    pub const fn hide(&self) -> bool {
         self.hash.is_none() && !self.check_enforced
     }
 }