Add api compatible way to get if project isolation is enabled

Gradle 8.0 internal API has changed returned type. To fix incorrect KGP
behaviour has to add additional Gradle 8.0 plugin variant and provide
project isolation start parameter accessor implementation for older
Gradle versions.

^KT-55624 In Progress

buildSrc/src/main/kotlin/GradleCommon.kt

@@ -39,7 +39,7 @@ import java.net.URL
 import java.util.*
 
 /**
- * Gradle plugins common variants.
+ * Gradle's plugins common variants.
  *
  * [minimalSupportedGradleVersion] - minimal Gradle version that is supported in this variant
  * [gradleApiVersion] - Gradle API dependency version. Usually should be the same as [minimalSupportedGradleVersion].
@@ -55,7 +55,8 @@ enum class GradlePluginVariant(
     GRADLE_71("gradle71", "7.1", "7.1", "https://docs.gradle.org/7.1.1/javadoc/"),
     GRADLE_74("gradle74", "7.4", "7.4", "https://docs.gradle.org/7.4.2/javadoc/"),
     GRADLE_75("gradle75", "7.5", "7.5", "https://docs.gradle.org/7.5.1/javadoc/"),
-    GRADLE_76("gradle76", "7.6", "7.6", "https://docs.gradle.org/7.6/javadoc/"),
+    GRADLE_76("gradle76", "7.6", "7.6", "https://docs.gradle.org/7.6.1/javadoc/"),
+    GRADLE_80("gradle80", "8.0", "8.0", "https://docs.gradle.org/8.0.2/javadoc/"),
 }
 
 val commonSourceSetName = "common"
@@ -438,7 +439,7 @@ fun Project.createGradlePluginVariant(
     }
 
     configurations.configureEach {
-        if (isCanBeConsumed && this@configureEach.name.startsWith(variantSourceSet.name)) {
+        if (this@configureEach.name.startsWith(variantSourceSet.name)) {
             attributes {
                 attribute(
                     GradlePluginApiVersion.GRADLE_PLUGIN_API_VERSION_ATTRIBUTE,
@@ -694,7 +695,9 @@ fun Project.configureDokkaPublication(
 // Workaround for https://github.com/Kotlin/dokka/issues/2097
 // Gradle 7.6 javadoc does not have published 'package-list' file
 private fun GradleExternalDocumentationLinkBuilder.addWorkaroundForElementList(pluginVariant: GradlePluginVariant) {
-    if (pluginVariant == GradlePluginVariant.GRADLE_76) {
+    if (pluginVariant == GradlePluginVariant.GRADLE_76 ||
+        pluginVariant == GradlePluginVariant.GRADLE_80
+    ) {
         packageListUrl.set(URL("${pluginVariant.gradleApiJavadocUrl}element-list"))
     }
 }

buildSrc/src/main/kotlin/gradle-plugin-common-configuration.gradle.kts

@@ -94,4 +94,11 @@ if (!kotlinBuildProperties.isInJpsBuildIdeaSync) {
         commonSourceSet = commonSourceSet
     )
     publishShadowedJar(gradle76SourceSet, commonSourceSet)
+
+    // Used for Gradle 8.0+ versions
+    val gradle80SourceSet = createGradlePluginVariant(
+        GradlePluginVariant.GRADLE_80,
+        commonSourceSet = commonSourceSet
+    )
+    publishShadowedJar(gradle80SourceSet, commonSourceSet)
 }

buildSrc/src/main/kotlin/gradle-plugin-dependency-configuration.gradle.kts

@@ -55,6 +55,13 @@ createGradlePluginVariant(
     isGradlePlugin = false
 )
 
+// Used for Gradle 8.0+ versions
+createGradlePluginVariant(
+    GradlePluginVariant.GRADLE_80,
+    commonSourceSet = commonSourceSet,
+    isGradlePlugin = false
+)
+
 publishing {
     publications {
         register<MavenPublication>(DEFAULT_MAIN_PUBLICATION_NAME) {