Update to be removed "host" cfg to "exec" (#1462)

Author: liucijus

jmh/jmh.bzl

@@ -62,7 +62,7 @@ scala_generate_benchmark = rule(
         ),
         "_generator": attr.label(
             executable = True,
-            cfg = "host",
+            cfg = "exec",
             default = Label(
                 "//src/scala/io/bazel/rules_scala/jmh_support:benchmark_generator",
             ),

scala/private/common_attributes.bzl

@@ -76,20 +76,20 @@ common_attrs.update({
         default = "@io_bazel_rules_scala//src/java/io/bazel/rulesscala/coverage/instrumenter",
         allow_files = True,
         executable = True,
-        cfg = "host",
+        cfg = "exec",
     ),
 })
 
 implicit_deps = {
     "_singlejar": attr.label(
         executable = True,
-        cfg = "host",
+        cfg = "exec",
         default = Label("@bazel_tools//tools/jdk:singlejar"),
         allow_files = True,
     ),
     "_zipper": attr.label(
         executable = True,
-        cfg = "host",
+        cfg = "exec",
         default = Label("@bazel_tools//tools/zip:zipper"),
         allow_files = True,
     ),
@@ -104,7 +104,7 @@ implicit_deps = {
     ),
     "_exe": attr.label(
         executable = True,
-        cfg = "host",
+        cfg = "exec",
         default = Label("@io_bazel_rules_scala//src/java/io/bazel/rulesscala/exe:exe"),
     ),
 }

scala/private/rules/scala_test.bzl

@@ -70,7 +70,7 @@ _scala_test_attrs = {
         ),
     ),
     "_scalatest_runner": attr.label(
-        cfg = "host",
+        cfg = "exec",
         default = Label("//src/java/io/bazel/rulesscala/scala_test:runner"),
     ),
     "_scalatest_reporter": attr.label(

scala/scalafmt/phase_scalafmt_ext.bzl

@@ -19,7 +19,7 @@ ext_scalafmt = {
             doc = "Switch of enabling formatting.",
         ),
         "_fmt": attr.label(
-            cfg = "host",
+            cfg = "exec",
             default = "//scala/scalafmt",
             executable = True,
         ),