Invalid error message: "Cannot redeclare block-scoped variable"

• Issue Type: Bug
• Extension Name: html-language-features
• Extension Version: 1.0.0
• OS Version: Linux x64 5.15.0-46-generic
• VS Code version: 1.70.2

{
	"messages": [],
	"activationTimes": {
		"codeLoadingTime": 16,
		"activateCallTime": 5,
		"activateResolvedTime": 360,
		"activationReason": {
			"startup": false,
			"extensionId": {
				"value": "vscode.html-language-features",
				"_lower": "vscode.html-language-features"
			},
			"activationEvent": "onLanguage:html"
		}
	},
	"runtimeErrors": [],
	"runningLocation": {
		"affinity": 0,
		"kind": 1
	}
}

When using this html code:

<script type="module">let a = 0;</script>
<script type="module">let a = 0;</script>

Problems tab reads: Cannot redeclare block-scoped variable 'a'.

Since I'm using module scripts the two variables live in isolated scopes.

However, the error message is valid for classic scripts:

<script>let a = 0;</script>
<script>let a = 0;</script>

The same issue arises when mixing both script types:

<script type="module">let a = 0;</script>
<script>let a = 0;</script>

Reproduce the reported diagnostics in the html-language-features service using the module, classic, and mixed script examples from the issue. Trace the HTML script-block validation entry point and adjust the scope handling so separate module scripts do not conflict, while classic and mixed cases retain the appropriate redeclaration diagnostic.