Excavator: Apply Gradle Plugin Testing Helper (#817)

Author: svc-excavator-bot

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         classpath 'com.palantir.jakartapackagealignment:jakarta-package-alignment:0.6.0'
         classpath 'com.palantir.gradle.jdks:gradle-jdks:0.69.0'
         classpath 'com.palantir.gradle.jdkslatest:gradle-jdks-latest:0.24.0'
-        classpath 'com.palantir.gradle.plugintesting:gradle-plugin-testing:0.25.0'
+        classpath 'com.palantir.gradle.plugintesting:gradle-plugin-testing:0.26.0'
         classpath 'com.palantir.gradle.externalpublish:gradle-external-publish-plugin:1.26.0'
         classpath 'com.gradle.publish:plugin-publish-plugin:2.0.0'
         classpath 'com.palantir.baseline:gradle-baseline-java:6.68.0'

versions.lock

@@ -56,11 +56,11 @@ cglib:cglib-nodep:3.2.2 (1 constraints: 490ded24)
 
 com.netflix.nebula:nebula-test:10.6.2 (2 constraints: d61de72d)
 
-com.palantir.gradle.plugintesting:configuration-cache-spec:0.25.0 (1 constraints: 3905363b)
+com.palantir.gradle.plugintesting:configuration-cache-spec:0.26.0 (1 constraints: 3a05393b)
 
-com.palantir.gradle.plugintesting:gradle-plugin-testing-junit:0.25.0 (1 constraints: 3905363b)
+com.palantir.gradle.plugintesting:gradle-plugin-testing-junit:0.26.0 (1 constraints: 3a05393b)
 
-com.palantir.gradle.plugintesting:plugin-testing-core:0.25.0 (1 constraints: 3905363b)
+com.palantir.gradle.plugintesting:plugin-testing-core:0.26.0 (1 constraints: 3a05393b)
 
 commons-io:commons-io:2.19.0 (1 constraints: db190cdf)