fix(es/minifier): Fix tpl-to-string conversion (#8778)

**Related issue:**

 - Closes #8773

crates/swc/tests/fixture/issues-8xxx/8773/input/.swcrc

@@ -0,0 +1,71 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "ecmascript",
+            "jsx": false
+        },
+        "target": "es2022",
+        "loose": false,
+        "minify": {
+            "compress": {
+                "arguments": false,
+                "arrows": true,
+                "booleans": true,
+                "booleans_as_integers": false,
+                "collapse_vars": true,
+                "comparisons": true,
+                "computed_props": true,
+                "conditionals": true,
+                "dead_code": true,
+                "directives": true,
+                "drop_console": false,
+                "drop_debugger": true,
+                "evaluate": true,
+                "expression": false,
+                "hoist_funs": false,
+                "hoist_props": true,
+                "hoist_vars": false,
+                "if_return": true,
+                "join_vars": true,
+                "keep_classnames": false,
+                "keep_fargs": true,
+                "keep_fnames": false,
+                "keep_infinity": false,
+                "loops": true,
+                "negate_iife": true,
+                "properties": true,
+                "reduce_funcs": false,
+                "reduce_vars": false,
+                "side_effects": true,
+                "switches": true,
+                "typeofs": true,
+                "unsafe": false,
+                "unsafe_arrows": false,
+                "unsafe_comps": false,
+                "unsafe_Function": false,
+                "unsafe_math": false,
+                "unsafe_symbols": false,
+                "unsafe_methods": false,
+                "unsafe_proto": false,
+                "unsafe_regexp": false,
+                "unsafe_undefined": false,
+                "unused": true,
+                "const_to_let": true,
+                "pristine_globals": true
+            },
+            "mangle": {
+                "toplevel": false,
+                "keep_classnames": false,
+                "keep_fnames": false,
+                "keep_private_props": false,
+                "ie8": false,
+                "safari10": false
+            }
+        }
+    },
+    "module": {
+        "type": "es6"
+    },
+    "minify": true,
+    "isModule": true
+}

crates/swc/tests/fixture/issues-8xxx/8773/input/1.js

@@ -0,0 +1 @@
+const t = "\\\\"; console.log(`${t}`)

crates/swc/tests/fixture/issues-8xxx/8773/output/1.js

@@ -0,0 +1 @@
+console.log("\\\\");

crates/swc_ecma_minifier/src/compress/pure/strings.rs

@@ -191,6 +191,7 @@ impl Pure<'_> {
             Expr::Tpl(t) if t.quasis.len() == 1 && t.exprs.is_empty() => {
                 if let Some(value) = &t.quasis[0].cooked {
                     if value.chars().all(|c| match c {
+                        '\\' => false,
                         '\u{0020}'..='\u{007e}' => true,
                         '\n' | '\r' => self.config.force_str_for_tpl,
                         _ => false,