Use separate folders for caching Gradle dependencies from Stable and Latest JetBrains Gateway Plugin

It's the same strategy we used on JetBrains Backend Plugin.

Reference: #15646 (comment)

Author: felladrin

components/ide/jetbrains/gateway-plugin/BUILD.yaml

@@ -17,7 +17,7 @@ packages:
       - DO_PUBLISH=${publishToJBMarketplace}
     config:
       commands:
-        - [ "./gradlew", "-PpluginVersion=0.0.1-${version}", "-PgitpodProtocolProjectPath=components-gitpod-protocol-java--lib/", "-PenvironmentName=stable", "buildFromLeeway" ]
+        - [ "./gradlew", "-PpluginVersion=0.0.1-${version}", "-PgitpodProtocolProjectPath=components-gitpod-protocol-java--lib/", "-PenvironmentName=stable", "-Dgradle.user.home=/workspace/.gradle-stable", "-Dplugin.verifier.home.dir=$HOME/.cache/pluginVerifier-stable", "buildFromLeeway" ]
   - name: publish-latest
     type: generic
     deps:
@@ -36,4 +36,4 @@ packages:
       - DO_PUBLISH=${publishToJBMarketplace}
     config:
       commands:
-        - [ "./gradlew", "-PpluginVersion=0.0.1-${version}", "-PgitpodProtocolProjectPath=components-gitpod-protocol-java--lib/", "-PenvironmentName=latest", "buildFromLeeway" ]
+        - [ "./gradlew", "-PpluginVersion=0.0.1-${version}", "-PgitpodProtocolProjectPath=components-gitpod-protocol-java--lib/", "-PenvironmentName=latest", "-Dgradle.user.home=/workspace/.gradle-latest", "-Dplugin.verifier.home.dir=$HOME/.cache/pluginVerifier-latest", "buildFromLeeway" ]