test(transformer): rename babel-plugin-proposal-explicit-resource-management test directory (#12894)

Fixes missing test cases for explicit resource management by renaming the test directory to match the updated plugin name.

## Background

PR #12874 updated references from the deprecated `@babel/plugin-proposal-explicit-resource-management` to the newer `@babel/plugin-transform-explicit-resource-management` package. However, the test directory under `tasks/transform_conformance/tests/` was not renamed, causing the test runner to miss 4 test cases.

## Issue

The transform conformance test runner iterates through plugins defined in `constants.rs` and looks for test fixtures in directories matching the plugin names. Since the plugin name was updated to `babel-plugin-transform-explicit-resource-management` but the directory remained `babel-plugin-proposal-explicit-resource-management`, the test runner couldn't find the test cases.

This resulted in 4 missing test cases in the `oxc.snap` file as noted by @Dunqing.

## Solution

Renamed the test directory:
```
tasks/transform_conformance/tests/babel-plugin-proposal-explicit-resource-management/
→ tasks/transform_conformance/tests/babel-plugin-transform-explicit-resource-management/
```

## Verification

After the fix, running the transform conformance tests now correctly discovers and executes all 4 test cases:
- export-class-name
- for-of-no-block
- function-with-scopes-in-params
- try-catch

The `oxc.snap` file now shows `babel-plugin-transform-explicit-resource-management (2/4)` indicating all 4 test cases are found (2 pass, 2 have implementation issues unrelated to this fix).

Closes the follow-up issue identified in #12874.

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tasks/transform_conformance/snapshots/oxc.snap.md

@@ -1,6 +1,6 @@
 commit: 98d18aa4
 
-Passed: 180/298
+Passed: 182/302
 
 # All Passed:
 * babel-plugin-transform-class-static-block
@@ -20,6 +20,25 @@ Passed: 180/298
 * regexp
 
 
+# babel-plugin-transform-explicit-resource-management (2/4)
+* export-class-name/input.js
+x Output mismatch
+
+* function-with-scopes-in-params/input.js
+Bindings mismatch:
+after transform: ScopeId(1): ["_usingCtx", "a", "b", "x", "y"]
+rebuilt        : ScopeId(1): ["_usingCtx", "a", "b"]
+Bindings mismatch:
+after transform: ScopeId(5): []
+rebuilt        : ScopeId(4): ["x", "y"]
+Symbol scope ID mismatch for "x":
+after transform: SymbolId(3): ScopeId(1)
+rebuilt        : SymbolId(4): ScopeId(4)
+Symbol scope ID mismatch for "y":
+after transform: SymbolId(4): ScopeId(1)
+rebuilt        : SymbolId(5): ScopeId(4)
+
+
 # babel-plugin-transform-class-properties (23/29)
 * private-field-resolve-to-method/input.js
 x Output mismatch