Flutter SDK Path resolves symlink

## Steps to Reproduce

1. Open Settings -> Languages & Frameworks -> Flutter
2. Enter a symlink path in the Flutter SDK path field and click Apply
3. The path is resolved

_Please tell us what you were doing and what went wrong_

The path shouldn't be resolved since this doesn't allow me to update the Flutter version using FVM in the shell.
The path is resolved which causes me to manually change the Flutter SDK version in the settings as well.

I use FVM for handling different Flutter versions in my ongoing projects. Switching a version works by calling `fvm use VERSION` in the console, where the symlink to the new Flutter version path is changed in `.fvm/flutter_sdk`

If i remember correctly the absolute path to the symlink could be entered in the mentioned SDK path text field and wasn't resolved when i clicked Apply or Ok in an earlier version of this plugin, which allowed me to only change the Flutter version in the shell which was then recognized and automatically updated in the IDE.

Now this isn't possible anymore since the path to the symlink isn't kept but resolved.

## Version info

[✓] Flutter (Channel stable, 3.3.2, on macOS 13.1 22C65 darwin-arm, locale en-CH)
• Flutter version 3.3.2 on channel stable at /Users/valley/fvm/versions/3.3.2
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision e3c29ec00c (5 months ago), 2022-09-14 08:46:55 -0500
• Engine revision a4ff2c53d8
• Dart version 2.18.1
• DevTools version 2.15.0

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
• Android SDK at /Users/valley/Library/Android/sdk
• Platform android-33, build-tools 33.0.1
• ANDROID_HOME = /Users/valley/Library/Android/sdk
• ANDROID_SDK_ROOT = /Users/valley/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14C18
• CocoaPods version 1.11.3

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2021.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)

[✓] IntelliJ IDEA Ultimate Edition (version 2022.3.2)
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin version 72.0.4
• Dart plugin version 223.8617.8

[✓] VS Code (version 1.74.3)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.58.0

[✓] Connected device (3 available)
• sdk gphone64 arm64 (mobile) • emulator-5554 • android-arm64 • Android 12 (API 32) (emulator)
• macOS (desktop) • macos • darwin-arm64 • macOS 13.1 22C65 darwin-arm
• Chrome (web) • chrome • web-javascript • Google Chrome 109.0.5414.119

[✓] HTTP Host Availability
• All required HTTP hosts are available

• No issues found!