[turbopack] Tree shake w/ bar['foo'] syntax for star imports (#96319)

This adds tree-shaking support for this syntax:

```javascript
import * as ns from './lib';
ns["foo"]
```

Instead of expanding the usage to `All` for this one, we can restrict
ourself to just "foo".

See attached fixture.

turbopack/crates/turbopack-ecmascript/src/analyzer/imports.rs

@@ -1336,7 +1336,12 @@ impl Visit for Analyzer<'_> {
 
         if matches!(
             &node.prop,
-            MemberProp::Ident(..) | MemberProp::PrivateName(..)
+            MemberProp::Ident(..)
+                | MemberProp::PrivateName(..)
+                | MemberProp::Computed(ComputedPropName {
+                    expr: box Expr::Lit(Lit::Str(_)),
+                    ..
+                })
         ) && let Expr::Ident(ident) = &*node.obj
         {
             // Intentionally skipping over visit_expr(node.obj) here so that it doesn't get added to

turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/index.js

@@ -0,0 +1,4 @@
+import * as lit from './lit.js'
+
+// A string-literal key narrows to `foo`, so `unused` leaves the bundle.
+console.log(lit['foo'])

turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/lit.js

@@ -0,0 +1,2 @@
+export function foo() {}
+export function unused() {}

turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/options.json

@@ -0,0 +1,11 @@
+{
+  "scopeHoisting": false,
+  "removeUnusedImports": true,
+  "removeUnusedExports": true,
+  "followReexports": true,
+  "minifyType": {
+    "Minify": {
+      "mangle": "optimal-size"
+    }
+  }
+}

turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/output/1ece_tests_snapshot_remove-unused-imports_star-import-string-key_input_index_1fhdw9l.js

@@ -0,0 +1,3 @@
+(globalThis.TURBOPACK||(globalThis.TURBOPACK=[])).push(["output/1ece_tests_snapshot_remove-unused-imports_star-import-string-key_input_index_1fhdw9l.js",{otherChunks:["output/1jsg_tests_snapshot_remove-unused-imports_star-import-string-key_input_03-1fx5._.js"],runtimeModuleIds:["[project]/turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/index.js [test] (ecmascript)"]}]);
+
+//# sourceMappingURL=1jsg_tests_snapshot_remove-unused-imports_star-import-string-key_input_index_1fhdw9l.js.map

turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/output/1jsg_tests_snapshot_remove-unused-imports_star-import-string-key_input_03-1fx5._.js

@@ -0,0 +1,3 @@
+(globalThis.TURBOPACK||(globalThis.TURBOPACK=[])).push(["output/1jsg_tests_snapshot_remove-unused-imports_star-import-string-key_input_03-1fx5._.js","[project]/turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/index.js [test] (ecmascript)",t=>{"use strict";console.log(t.i("[project]/turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/lit.js [test] (ecmascript)").foo),t.s([])},"[project]/turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/lit.js [test] (ecmascript)",t=>{"use strict";t.s(["foo",0,function(){}])}]);
+
+//# sourceMappingURL=1jsg_tests_snapshot_remove-unused-imports_star-import-string-key_input_03-1fx5._.js.map

turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/output/1jsg_tests_snapshot_remove-unused-imports_star-import-string-key_input_03-1fx5._.js.map

@@ -0,0 +1 @@
+{"version":3,"sources":["turbopack:///[project]/turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/index.js","turbopack:///[project]/turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/input/lit.js"],"sourcesContent":["import * as lit from './lit.js'\n\n// A string-literal key narrows to `foo`, so `unused` leaves the bundle.\nconsole.log(lit['foo'])\n","export function foo() {}\nexport function unused() {}\n"],"names":["console","log","foo","unused"],"mappings":"kTAGAA,QAAQC,GAAG,CAHX,AAGY,EAHZ,CAAA,CAAA,2IAGY,GAAU,mLCHf,SAASC,EAAO"}

turbopack/crates/turbopack-tests/tests/snapshot/remove-unused-imports/star-import-string-key/output/1jsg_tests_snapshot_remove-unused-imports_star-import-string-key_input_index_1fhdw9l.js.map

@@ -0,0 +1 @@
+{"version":3,"sources":[],"names":[],"mappings":""}