update strip-ansi-escapes to use new api (#9958)

# Description

This PR updates `strip-ansi-escapes` to support their new API. This also
updates nushell to the latest reedline after the same fix
https://github.com/nushell/reedline/pull/617

closes #9957 

# User-Facing Changes
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crates/nu-utils/src/deansi.rs

@@ -13,10 +13,8 @@ pub fn strip_ansi_unlikely(string: &str) -> Cow<str> {
     // which will be stripped. Includes the primary start of ANSI sequences ESC
     // (0x1B = decimal 27)
     if string.bytes().any(|x| matches!(x, 0..=9 | 11..=31)) {
-        if let Ok(stripped) = strip_ansi_escapes::strip(string) {
-            if let Ok(new_string) = String::from_utf8(stripped) {
-                return Cow::Owned(new_string);
-            }
+        if let Ok(stripped) = String::from_utf8(strip_ansi_escapes::strip(string)) {
+            return Cow::Owned(stripped);
         }
     }
     // Else case includes failures to parse!
@@ -34,10 +32,8 @@ pub fn strip_ansi_likely(string: &str) -> Cow<str> {
     // Check if any ascii control character except LF(0x0A = 10) is present,
     // which will be stripped. Includes the primary start of ANSI sequences ESC
     // (0x1B = decimal 27)
-    if let Ok(stripped) = strip_ansi_escapes::strip(string) {
-        if let Ok(new_string) = String::from_utf8(stripped) {
-            return Cow::Owned(new_string);
-        }
+    if let Ok(stripped) = String::from_utf8(strip_ansi_escapes::strip(string)) {
+        return Cow::Owned(stripped);
     }
     // Else case includes failures to parse!
     Cow::Borrowed(string)
@@ -60,10 +56,8 @@ pub fn strip_ansi_string_unlikely(string: String) -> String {
         .bytes()
         .any(|x| matches!(x, 0..=9 | 11..=31))
     {
-        if let Ok(stripped) = strip_ansi_escapes::strip(&string) {
-            if let Ok(new_string) = String::from_utf8(stripped) {
-                return new_string;
-            }
+        if let Ok(stripped) = String::from_utf8(strip_ansi_escapes::strip(&string)) {
+            return stripped;
         }
     }
     // Else case includes failures to parse!
@@ -81,10 +75,8 @@ pub fn strip_ansi_string_likely(string: String) -> String {
     // Check if any ascii control character except LF(0x0A = 10) is present,
     // which will be stripped. Includes the primary start of ANSI sequences ESC
     // (0x1B = decimal 27)
-    if let Ok(stripped) = strip_ansi_escapes::strip(&string) {
-        if let Ok(new_string) = String::from_utf8(stripped) {
-            return new_string;
-        }
+    if let Ok(stripped) = String::from_utf8(strip_ansi_escapes::strip(&string)) {
+        return stripped;
     }
     // Else case includes failures to parse!
     string