SONAR-21999 Change lts wording to lta

server/sonar-webserver-core/src/main/java/org/sonar/server/platform/DatabaseServerCompatibility.java

     if (status == DatabaseVersion.Status.REQUIRES_UPGRADE) {
       Optional<Long> currentVersion = this.version.getVersion();
       if (currentVersion.isPresent() && currentVersion.get() < DatabaseVersion.MIN_UPGRADE_VERSION) {
-        throw MessageException.of("Current version is too old. Please upgrade to Long Term Support version firstly.");
+        throw MessageException.of("The version of SonarQube is too old. Please upgrade to the Long-Term Active version first.");
       }
       boolean blueGreen = configuration.getBoolean(ProcessProperties.Property.BLUE_GREEN_ENABLED.getKey()).orElse(false);
       if (!blueGreen) {

server/sonar-webserver-core/src/test/java/org/sonar/server/platform/DatabaseServerCompatibilityTest.java

   }
 
   @Test
-  public void fail_if_requires_firstly_to_upgrade_to_lts() {
+  public void fail_if_requires_firstly_to_upgrade_to_lta() {
     DatabaseVersion version = mock(DatabaseVersion.class);
     when(version.getStatus()).thenReturn(DatabaseVersion.Status.REQUIRES_UPGRADE);
     when(version.getVersion()).thenReturn(Optional.of(12L));
     var compatibility = new DatabaseServerCompatibility(version, config);
     assertThatThrownBy(compatibility::start)
       .isInstanceOf(MessageException.class)
-      .hasMessage("Current version is too old. Please upgrade to Long Term Support version firstly.");
+      .hasMessage("The version of SonarQube is too old. Please upgrade to the Long-Term Active version first.");
   }
 
   @Test

sonar-core/src/main/resources/org/sonar/l10n/core.properties

 system.how_to_upgrade=How to upgrade?
 system.latest_version=Latest Version
 system.latest_patch=Patch Release
-system.lts_version=Latest LTS Version
+system.lts_version=Latest LTA Version
 system.log_level.warning=This level has performance impacts, please make sure to get back to INFO level once your investigation is done. Please note that when the server is restarted, logging will revert to the level configured in sonar.properties.
 system.log_level.warning.short=Current logs level has performance impacts, get back to INFO level.
 system.log_level.info=Your selection does not affect the Search Engine.