Incorrect error `details` when the `LoadSketchRequest` fails with `NOT_FOUND` error

[kittaakos]

Describe the problem

If I have such a gRPC LoadSketchRequest:

{
    "instance": {
        "id": 1
    },
    "sketchPath": "/Users/a.kitta/Documents/Arduino/alma"
}

And the folder is missing from the file system:

 % cd ~/Documents/Arduino/alma
cd: no such file or directory: /Users/a.kitta/Documents/Arduino/alma

Then the request correctly fails with a NOT_FOUND status code but the error details is incorrect:

{
    "code": 5,
    "details": "Can't open sketch: no valid sketch found in /Users/a.kitta/Documents/Arduino: missing /Users/a.kitta/Documents/Arduino/Arduino.ino",
    "metadata": {
        "content-type": [
            "application/grpc"
        ]
    }
}

The error message should be about Arduino/alma/alma.ino and not Arduino/Arduino.ino. The directories.user location exists on my disk:

% ls -al ~/Documents/Arduino 
total 0
drwxr-xr-x  2 a.kitta  staff   64 Jul  8 16:50 .
drwx------+ 5 a.kitta  staff  160 Jul  6 15:46 ..

To reproduce

• Get the IDE2 build from here: #1089: IDE falls back to new sketch if opening failed arduino-ide#1152
• Create a new sketch and save it,
• Quit IDE2,
• Delete the previously deleted sketch and start IDE2,
• You will see the incorrect error message

Expected behavior

It should complain about ~/Documents/Arduino/alma and not ~/Documents/Arduino/

Arduino CLI version

0.24.0

Operating system

macOS

Operating system version

12.3.1

Additional context

No response

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the nightly build
• My report contains all necessary details

[per1234]

The issue also occurs with the Arduino CLI command line interface:

$ arduino-cli version
arduino-cli.exe  Version: git-snapshot Commit: 6ac5f7a3 Date: 2022-07-09T19:16:18Z

$ mkdir /tmp/Arduino

$ arduino-cli compile -b arduino:avr:uno /tmp/Arduino/alma
Error opening sketch: no valid sketch found in C:\Users\per\AppData\Local\Temp\Arduino: missing C:\Users\per\AppData\Local\Temp\Arduino\Arduino.ino

$ arduino-cli compile -b arduino:avr:uno /tmp/Arduino/alma/alma.ino
Error opening sketch: reading files: open C:\Users\per\AppData\Local\Temp\Arduino\alma: The system cannot find the file specified.

$ arduino-cli compile -b arduino:avr:uno /tmp/Arduino/alma/nonexistent
Error opening sketch: reading files: open C:\Users\per\AppData\Local\Temp\Arduino\alma: The system cannot find the file specified.

The error message code was written based on the unwarranted assumption that people always provide the full path to the .ino file. However, it's faster and more correct (because the folder is the sketch, not the .ino file) to only provide the path to the sketch folder.