reportCallIssue with Python 3.15 `frozendict` when called with arguments

**Describe the bug**
I was trying out Python 3.15's new `frozendict` with pre-release Pyright.
While Pyright does come with the correct typeshed-fallback stubs which contain the correct overloaded forms of `frozendict`, it still doesn't recognize the argument forms of `frozendict()` when in use.

**Code or Screenshots**
```python
foo = frozendict() # OK with no arguments
bar = frozendict({}) # Expected 0 positional arguments (reportCallIssue)
baz = frozendict(qux="spam") # No parameter named "qux" (reportCallIssue)
```

**VS Code extension or command-line**
Both VS Code extension (Pylance 2026.3.102 pre-release) and Pyright Playground exhibited the same issue as of today (September 12 2026).

Reproduce the three frozendict calls in the Pyright Playground using Python 3.15 and the reported pre-release typeshed-fallback stubs. Compare the behavior of the no-argument, positional-mapping, and keyword-argument forms in both the Playground and VS Code extension. Done means the argument forms no longer produce reportCallIssue diagnostics while the no-argument form remains valid.

Written by the indexing model from the issue text.