Factorise the regexp

Author: amarziali

buildSrc/src/main/kotlin/datadog/gradle/plugin/naming/InstrumentationNamingPlugin.kt

@@ -21,6 +21,8 @@ import java.io.File
  * ```
  */
 class InstrumentationNamingPlugin : Plugin<Project> {
+  val versionPattern : Regex = Regex("""\d+\.\d+(\.\d+)?$""")
+
   override fun apply(target: Project) {
     val extension = target.extensions.create(
       "instrumentationNaming",
@@ -131,7 +133,6 @@ class InstrumentationNamingPlugin : Plugin<Project> {
     relativePath: String
   ): NamingViolation? {
     // Rule 1: Module name must end with version pattern (X.Y, X.Y.Z, etc.) or "-common"
-    val versionPattern = Regex("""\d+\.\d+(\.\d+)?$""")
     val endsWithCommon = moduleName.endsWith("-common")
     val endsWithVersion = versionPattern.containsMatchIn(moduleName)
 
@@ -163,7 +164,6 @@ class InstrumentationNamingPlugin : Plugin<Project> {
     relativePath: String
   ): NamingViolation? {
     // Rule: Module name must end with version pattern (X.Y, X.Y.Z, etc.) or "-common"
-    val versionPattern = Regex("""\d+\.\d+(\.\d+)?$""")
     val endsWithCommon = moduleName.endsWith("-common")
     val endsWithVersion = versionPattern.containsMatchIn(moduleName)