bug#73355: 29.4; eglot-rename reports success when it shouldn't

[Joost Kremers <joostkremers@fastmail.fm>]

I tried to use 'eglot-rename' to rename a variable to a name that already
existed in the relevant function. The change was not applied but Eglot
nonetheless reported "[eglot] Edit successful!".

This was in a Python buffer, using python-ts-mode and basedpyright
(v1.17.1) as language server. The relevant code snippet:

```
def main():
    sizes = [100, 1000, 10000]
    results: dict[str, list[float]] = {
        "Linear search": [],
        "Binary search": [],
        "Interpolation search": [],
    }
    for size in sizes:
        seq: list[int] = sorted([random.randint(0, 10000) for _ in range(size)])
        x = random.choice(arr)
        results["Linear search"].append(measure_time(linear_search, arr, x))
        results["Binary search"].append(measure_time(binary_search, arr, x))
        results["Interpolation search"].append(
            measure_time(interpolation_search, arr, x)
        )
```

Note the 'seq' variable in the first line of the for loop, and the 'arr'
variable in the three '.append' invocations. With point on the first 'arr',
calling eglot-rename and giving 'seq' as the new name, Eglot refuses to
rename the three occurrences of 'arr' (which makes sense, given that a
variable with that name obviously already exists), but still reports
success.

(Note that there is no problem if the 'seq' above is also 'arr'. Then
renaming works fine.)



In GNU Emacs 29.4 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.43,
cairo version 1.18.0)
System Description: Arch Linux

Configured using:
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-- 
Joost Kremers
Life has its moments