Allow typed bindings(and!) in CE without parentheses

[edgarfgp]

Description

Allow computation expression (CE) bindings (let!, use!, and!) to accept type annotations without requiring parentheses.

Continuation of #18508
Implements RFC FS-1329: fsharp/fslang-design#802

Introduces significant grammar unification:

• New parsing rules: bindingPatternWithOptType and ceBindingCore
• New helper functions: mkLetExpression and mkAndBang
• Renamed language feature to AllowTypedLetUseAndBang

The above rule unification will allow us to remove in a separate PR LetOrUseBang, adding boolenisComputed property(true for let!/use!, false for let/use) to LetOrUse.

type SynExpr =
    | LetOrUse of 
        isRecursive: bool * 
        isUse: bool * 
        isComputed: bool *     // NEW: true for let!/use!, false for let/use
        bindings: SynBinding list * 
        body: SynExpr * 
        range: range * 
        trivia: SynExprLetOrUseTrivia

Checklist

• Test cases added
• Release notes entry updated

[github-actions]

❗ Release notes required

---

✅ Found changes and release notes in following paths:

Change path	Release notes path	Description
src/Compiler	docs/release-notes/.FSharp.Compiler.Service/10.0.100.md
LanguageFeatures.fsi	docs/release-notes/.Language/preview.md

[edgarfgp]

This is ready @T-Gro

[T-Gro]

Thanks @edgarfgp for getting this in.
The resulting parser code is more unified and better readable across the similar syntactical constructs 👍 .

[edgarfgp]

/azn run

[edgarfgp]

Thanks @T-Gro. Can you please re-run the CI ?. Don't want to close a re-open the PR.

[T-Gro]

/azp run

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