Apply exec transition to lcov_merger in sh_test and cc_test

Fixes #17630

Closes #17631.

PiperOrigin-RevId: 513254952
Change-Id: Id97892db8adca0d8bbb5ecd87a44e3f711a5b56c

Author: thirtyseven

src/main/java/com/google/devtools/build/lib/bazel/rules/cpp/BazelCcTestRule.java

@@ -48,7 +48,10 @@ public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment env)
         // to decorate data symbols imported from DLL.
         .override(attr("linkstatic", BOOLEAN).value(OS.getCurrent() == OS.WINDOWS))
         .override(attr("stamp", TRISTATE).value(TriState.NO))
-        .add(attr(":lcov_merger", LABEL).value(BaseRuleClasses.getCoverageOutputGeneratorLabel()))
+        .add(
+            attr(":lcov_merger", LABEL)
+                .cfg(ExecutionTransitionFactory.create())
+                .value(BaseRuleClasses.getCoverageOutputGeneratorLabel()))
         .add(
             attr("$collect_cc_coverage", LABEL)
                 .cfg(ExecutionTransitionFactory.create())

src/main/java/com/google/devtools/build/lib/bazel/rules/sh/BazelShTestRule.java

@@ -32,7 +32,10 @@ public final class BazelShTestRule implements RuleDefinition {
   public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment environment) {
     // TODO(bazel-team): Add :lcov_merger to every test rule as opposed to particular rules.
     builder
-        .add(attr(":lcov_merger", LABEL).value(BaseRuleClasses.getCoverageOutputGeneratorLabel()))
+        .add(
+            attr(":lcov_merger", LABEL)
+                .cfg(ExecutionTransitionFactory.create())
+                .value(BaseRuleClasses.getCoverageOutputGeneratorLabel()))
         .add(
             attr("$launcher", LABEL)
                 .cfg(ExecutionTransitionFactory.create())