[Uber] Downgrade kotlin compiler/ksp version from 2.1->2.0 as needed by Uber codebase

Author: oliviernotteghem

kotlin/internal/toolchains.bzl

@@ -134,7 +134,7 @@ _kt_toolchain = rule(
         ),
         "language_version": attr.string(
             doc = "this is the -language_version flag [see](https://kotlinlang.org/docs/reference/compatibility.html)",
-            default = "2.1",
+            default = "2.0",
             values = [
                 "1.1",
                 "1.2",
@@ -151,7 +151,7 @@ _kt_toolchain = rule(
         ),
         "api_version": attr.string(
             doc = "this is the -api_version flag [see](https://kotlinlang.org/docs/reference/compatibility.html).",
-            default = "2.1",
+            default = "2.0",
             values = [
                 "1.1",
                 "1.2",

src/main/starlark/core/repositories/versions.bzl

@@ -57,18 +57,18 @@ versions = struct(
         sha256 = "a9f923be58fbd32670a17f0b729b1df804af882fa57402165741cb26e5440ca1",
     ),
     KOTLIN_CURRENT_COMPILER_RELEASE = version(
-        version = "2.1.0",
+        version = "2.0.0",
         url_templates = [
             "https://github.com/JetBrains/kotlin/releases/download/v{version}/kotlin-compiler-{version}.zip",
         ],
-        sha256 = "b6698d5728ad8f9edcdd01617d638073191d8a03139cc538a391b4e3759ad297",
+        sha256 = "ef578730976154fd2c5968d75af8c2703b3de84a78dffe913f670326e149da3b",
     ),
     KSP_CURRENT_COMPILER_PLUGIN_RELEASE = version(
-        version = "2.1.0-1.0.28",
+        version = "2.0.0-1.0.21",
         url_templates = [
             "https://github.com/google/ksp/releases/download/{version}/artifacts.zip",
         ],
-        sha256 = "fc27b08cadc061a4a989af01cbeccb613feef1995f4aad68f2be0f886a3ee251",
+        sha256 = "84100aed5b63effa992ce6574b3ba47d2dbb78529752daa4c181e203117ba7de",
     ),
     ANDROID = version(
         version = "a5e11f139ae25d93832e2604e1588bc97708d7e8",