[gradle] Downgrade gradle in tests to 8.3 because of issue on Windows

It fails DesktopApplicationTest.proguard test on Windows:
Execution failed for task ':createReleaseDistributable'.
> java.io.IOException: Unable to delete directory 'C:\Users\runneradmin\AppData\Local\Temp\junit15199828818905379674\build\compose\binaries\main-release\app'
Failed to delete some children. This might happen because a process has files open or has its working directory set in the target directory.
- C:\Users\runneradmin\AppData\Local\Temp\junit15199828818905379674\build\compose\binaries\main-release\app\simple\simple.exe
- C:\Users\runneradmin\AppData\Local\Temp\junit15199828818905379674\build\compose\binaries\main-release\app\simple

More info: gradle/gradle#26912

.github/workflows/gradle-plugin.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, macos-12, windows-2022]
-        gradle: [7.4, 8.6]
+        gradle: [7.4, 8.3]
         agp: [7.3.1, 8.2.2]
     runs-on: ${{ matrix.os }}
     steps:

gradle-plugins/gradle.properties

@@ -14,7 +14,12 @@ compose.tests.js.compiler.compatible.kotlin.version=1.9.22
 # __SUPPORTED_GRADLE_VERSIONS__
 # Don't forget to edit versions in .github/workflows/gradle-plugin.yml as well
 # minimal and current gradle version
-compose.tests.gradle.versions=7.4, 8.6
+#
+# !!! we can't update to the gradle upper than 8.3 because of on issue:
+# https://github.com/gradle/gradle/issues/26912
+# It fails DesktopApplicationTest.proguard test on Windows
+# Should be fixed in 8.7
+compose.tests.gradle.versions=7.4, 8.3
 compose.tests.agp.versions=7.3.1, 8.2.2
 
 # A version of Gradle plugin, that will be published,