test/system: Group the test cases somewhat logically

It seems that as new test cases got developed they got appended towards
the end of the file.  Now that there are a non-trivial number of test
cases, it's difficult to look at the file and get a gist of all the
scenarios being tested.

It will be better to have some logical grouping -- starting with the
most basic functionality, then moving on to more advanced features,
and then finally the errors.

This a step towards that.

https://github.com/containers/toolbox/pull/1152

test/system/104-run.bats

@@ -13,6 +13,15 @@ teardown() {
   cleanup_containers
 }
 
+@test "run: Run command exiting with zero code in the default container" {
+  create_default_container
+
+  run $TOOLBOX run true
+
+  assert_success
+  assert_output ""
+}
+
 @test "run: Ensure that a login shell is used to invoke the command" {
   create_default_container
 
@@ -28,6 +37,27 @@ teardown() {
   assert [ ${#lines[@]} -eq 1 ]
 }
 
+@test "run: Run echo 'Hello World' inside of the default container" {
+  create_default_container
+
+  run $TOOLBOX --verbose run echo -n "Hello World"
+
+  assert_success
+  assert_line --index $((${#lines[@]}-1)) "Hello World"
+}
+
+@test "run: Run echo 'Hello World' inside a container after being stopped" {
+  create_container running
+
+  start_container running
+  stop_container running
+
+  run $TOOLBOX --verbose run --container running echo -n "Hello World"
+
+  assert_success
+  assert_line --index $((${#lines[@]}-1)) "Hello World"
+}
+
 @test "run: Try to run a command in the default container with no containers created" {
   local default_container_name="$(get_system_id)-toolbox-$(get_system_version)"
 
@@ -136,27 +166,6 @@ teardown() {
   assert [ ${#lines[@]} -eq 3 ]
 }
 
-@test "run: Run echo 'Hello World' inside of the default container" {
-  create_default_container
-
-  run $TOOLBOX --verbose run echo -n "Hello World"
-
-  assert_success
-  assert_line --index $((${#lines[@]}-1)) "Hello World"
-}
-
-@test "run: Run echo 'Hello World' inside a container after being stopped" {
-  create_container running
-
-  start_container running
-  stop_container running
-
-  run $TOOLBOX --verbose run --container running echo -n "Hello World"
-
-  assert_success
-  assert_line --index $((${#lines[@]}-1)) "Hello World"
-}
-
 @test "run: Run sudo id inside of the default container" {
   create_default_container
 
@@ -172,15 +181,6 @@ teardown() {
   assert_output --partial "uid=0(root)"
 }
 
-@test "run: Run command exiting with zero code in the default container" {
-  create_default_container
-
-  run $TOOLBOX run true
-
-  assert_success
-  assert_output ""
-}
-
 @test "run: Run command exiting with non-zero code in the default container" {
   create_default_container