Fix Gateway SDK version for 2025.3

Use version string (253.28294-EAP-CANDIDATE-SNAPSHOT) instead of build number (253.28294.92)

Author: aseemxs

buildSrc/src/main/kotlin/software/aws/toolkits/gradle/intellij/IdeVersions.kt

@@ -156,7 +156,7 @@ object IdeVersions {
         Profile(
             name = "2025.3",
             gateway = ProductProfile(
-                sdkVersion = "253.28294.92",
+                sdkVersion = "253.28294-EAP-CANDIDATE-SNAPSHOT",
                 bundledPlugins = listOf("org.jetbrains.plugins.terminal")
             ),
             community = ProductProfile(