Add --incompatible_disable_third_party_license_checking.

This flag makes all license-related BUILD syntax no-ops.

After this flag is permanently turned on in Bazel, we can start
stripping out the syntax.

This is unfortunately complex because it has to coherently interplay
with the related flag --check_third_party_targets_have_licenses.

See #7444 and #7553.

PiperOrigin-RevId: 235779781

src/test/java/com/google/devtools/build/lib/packages/RuleClassTest.java

diff --git a/src/test/java/com/google/devtools/build/lib/packages/RuleClassTest.java b/src/test/java/com/google/devtools/build/lib/packages/RuleClassTest.java
index 4cbb2fe..122c7ff 100644
--- a/src/test/java/com/google/devtools/build/lib/packages/RuleClassTest.java
+++ b/src/test/java/com/google/devtools/build/lib/packages/RuleClassTest.java
@@ -50,6 +50,7 @@
 import com.google.devtools.build.lib.packages.Attribute.ValidityPredicate;
 import com.google.devtools.build.lib.packages.ConfigurationFragmentPolicy.MissingFragmentPolicy;
 import com.google.devtools.build.lib.packages.RuleClass.Builder.RuleClassType;
+import com.google.devtools.build.lib.packages.RuleClass.Builder.ThirdPartyLicenseExistencePolicy;
 import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory;
 import com.google.devtools.build.lib.packages.RuleClass.ExecutionPlatformConstraintsAllowed;
 import com.google.devtools.build.lib.packages.RuleFactory.BuildLangTypedAttributeValuesMap;
@@ -910,6 +911,7 @@
             .setMissingFragmentPolicy(missingFragmentPolicy)
             .build(),
         supportsConstraintChecking,
+        ThirdPartyLicenseExistencePolicy.USER_CONTROLLABLE,
         /*requiredToolchains=*/ ImmutableSet.of(),
         /*supportsPlatforms=*/ true,
         ExecutionPlatformConstraintsAllowed.PER_RULE,

src/test/java/com/google/devtools/build/lib/packages/SkylarkSemanticsConsistencyTest.java

diff --git a/src/test/java/com/google/devtools/build/lib/packages/SkylarkSemanticsConsistencyTest.java b/src/test/java/com/google/devtools/build/lib/packages/SkylarkSemanticsConsistencyTest.java
index 70dde2c..34fe7a5 100644
--- a/src/test/java/com/google/devtools/build/lib/packages/SkylarkSemanticsConsistencyTest.java
+++ b/src/test/java/com/google/devtools/build/lib/packages/SkylarkSemanticsConsistencyTest.java
@@ -138,6 +138,7 @@
         "--incompatible_depset_union=" + rand.nextBoolean(),
         "--incompatible_disable_deprecated_attr_params=" + rand.nextBoolean(),
         "--incompatible_disable_objc_provider_resources=" + rand.nextBoolean(),
+        "--incompatible_disable_third_party_license_checking=" + rand.nextBoolean(),
         "--incompatible_disallow_data_transition=" + rand.nextBoolean(),
         "--incompatible_disallow_dict_plus=" + rand.nextBoolean(),
         "--incompatible_disallow_filetype=" + rand.nextBoolean(),
@@ -185,6 +186,7 @@
         .incompatibleDepsetUnion(rand.nextBoolean())
         .incompatibleDisableDeprecatedAttrParams(rand.nextBoolean())
         .incompatibleDisableObjcProviderResources(rand.nextBoolean())
+        .incompatibleDisableThirdPartyLicenseChecking(rand.nextBoolean())
         .incompatibleDisallowDataTransition(rand.nextBoolean())
         .incompatibleDisallowDictPlus(rand.nextBoolean())
         .incompatibleDisallowFileType(rand.nextBoolean())