MDL-66120 block_community: Remove community block and related caps

With the sunsetting of moodle.net, the community block will no longer
be functional, so removing the block and related caps

admin/tool/behat/tests/behat/edit_permissions.feature

@@ -20,12 +20,12 @@ Feature: Edit capabilities
     And I set the following system permissions of "Teacher" role:
       | capability | permission |
       | block/mnet_hosts:myaddinstance | Allow |
-      | moodle/community:add | Inherit |
+      | moodle/site:messageanyuser | Inherit |
       | moodle/grade:managesharedforms | Prevent |
       | moodle/course:request | Prohibit |
     When I follow "Edit Teacher role"
     Then "block/mnet_hosts:myaddinstance" capability has "Allow" permission
-    And "moodle/community:add" capability has "Not set" permission
+    And "moodle/site:messageanyuser" capability has "Not set" permission
     And "moodle/grade:managesharedforms" capability has "Prevent" permission
     And "moodle/course:request" capability has "Prohibit" permission
 

backup/util/ui/tests/behat/restore_moodle2_courses.feature

@@ -20,15 +20,15 @@ Feature: Restore Moodle 2 course backups
     And I add a "Forum" to section "1" and I fill the form with:
       | Forum name | Test forum name |
       | Description | Test forum description |
-    And I add the "Community finder" block
+    And I add the "Activities" block
 
   @javascript
   Scenario: Restore a course in another existing course
     When I backup "Course 1" course using this options:
       | Confirmation | Filename | test_backup.mbz |
     And I restore "test_backup.mbz" backup into "Course 2" course using this options:
     Then I should see "Course 2"
-    And I should see "Community finder" in the "Community finder" "block"
+    And I should see "Activities" in the "Activities" "block"
     And I should see "Test forum name"
 
   @javascript
@@ -38,7 +38,7 @@ Feature: Restore Moodle 2 course backups
     And I restore "test_backup.mbz" backup into a new course using this options:
       | Schema | Course name | Course 1 restored in a new course |
     Then I should see "Course 1 restored in a new course"
-    And I should see "Community finder" in the "Community finder" "block"
+    And I should see "Activities" in the "Activities" "block"
     And I should see "Test forum name"
     And I should see "Topic 15"
     And I should not see "Topic 16"
@@ -72,7 +72,7 @@ Feature: Restore Moodle 2 course backups
     Then I should see "Course 1"
     And I should not see "Section 3"
     And I should not see "Test forum post backup name"
-    And I should see "Community finder" in the "Community finder" "block"
+    And I should see "Activities" in the "Activities" "block"
     And I should see "Test forum name"
 
   @javascript