fix(codegen): 'getter for buildDir: File!' is deprecated

Author: trivikr

codegen/build.gradle.kts

@@ -125,7 +125,7 @@ subprojects {
             repositories {
                 maven {
                     name = "stagingRepository"
-                    url = uri("${rootProject.buildDir}/staging")
+                    url = rootProject.layout.buildDirectory.dir("staging").get().asFile.toURI()
                 }
             }
 
@@ -217,7 +217,9 @@ subprojects {
             reports {
                 xml.required.set(false)
                 csv.required.set(false)
-                html.outputLocation.set(file("$buildDir/reports/jacoco"))
+                html.outputLocation.set(
+                    layout.buildDirectory.dir("reports/jacoco").get().asFile
+                )
             }
         }
 
@@ -288,7 +290,9 @@ jreleaser {
                 create("maven-central") {
                     active = Active.ALWAYS
                     url = "https://central.sonatype.com/api/v1/publisher"
-                    stagingRepositories.add("${rootProject.buildDir}/staging")
+                    stagingRepositories.add(
+                        rootProject.layout.buildDirectory.dir("staging").get().asFile.absolutePath
+                    )
                 }
             }
         }

codegen/smithy-aws-typescript-codegen/build.gradle.kts

@@ -53,9 +53,11 @@ dependencies {
 
 tasks.register("set-aws-sdk-versions") {
     doLast {
-        mkdir("$buildDir/generated/resources/software/amazon/smithy/aws/typescript/codegen")
-        var versionsFile =
-                file("$buildDir/generated/resources/software/amazon/smithy/aws/typescript/codegen/sdkVersions.properties")
+        mkdir(layout.buildDirectory.dir("generated/resources/software/amazon/smithy/aws/typescript/codegen").get().asFile)
+        var versionsFile = layout.buildDirectory
+            .file("generated/resources/software/amazon/smithy/aws/typescript/codegen/sdkVersions.properties")
+            .get()
+            .asFile
         versionsFile.printWriter().close()
 
         var roots = project.file("../../packages").listFiles().toMutableList() + project.file("../../clients").listFiles().toList()