test: Improve usage of lxd sql in tests (#14674)

Support for the `--format` flag was added in #14670. This PR uses the
format flag where possible in our test suite to avoid e.g. grepping for
table formatted output.

In some cases I've changed queries to use a `SELECT count(*) FROM ...`
instead of a `SELECT * FROM ...` where the output was piped into a word
count or grepped with the -c flag.

test/suites/auth.sh

@@ -76,7 +76,7 @@ test_authorization() {
   # Test permission is removed automatically when instance is removed.
   lxc auth group permission add test-group instance c1 can_exec project=default # Valid
   lxc rm c1 --force
-  ! lxd sql global "SELECT * FROM auth_groups_permissions WHERE entitlement = 'can_exec'" | grep c1 || false # Permission should be removed when instance is removed.
+  [ "$(lxd sql global --format csv "SELECT count(*) FROM auth_groups_permissions WHERE entitlement = 'can_exec'")" = 0 ] # Permission should be removed when instance is removed.
 
   # Network permissions
   ! lxc auth group permission add test-group network n1 can_view project=default || false # Not found

test/suites/backup.sh

@@ -221,7 +221,7 @@ EOF
     lxc exec c1 --project test -- hostname
 
     # Test recover after pool DB config deletion too.
-    poolConfigBefore=$(lxd sql global "SELECT key,value FROM storage_pools_config JOIN storage_pools ON storage_pools.id = storage_pools_config.storage_pool_id WHERE storage_pools.name = '${poolName}' ORDER BY key")
+    poolConfigBefore=$(lxd sql global --format csv "SELECT key,value FROM storage_pools_config JOIN storage_pools ON storage_pools.id = storage_pools_config.storage_pool_id WHERE storage_pools.name = '${poolName}' ORDER BY key")
     poolSource=$(lxc storage get "${poolName}" source)
     poolExtraConfig=""
 
@@ -259,7 +259,7 @@ EOF
 
     # Check recovered pool config (from instance backup file) matches what originally was there.
     lxc storage show "${poolName}"
-    poolConfigAfter=$(lxd sql global "SELECT key,value FROM storage_pools_config JOIN storage_pools ON storage_pools.id = storage_pools_config.storage_pool_id WHERE storage_pools.name = '${poolName}' ORDER BY key")
+    poolConfigAfter=$(lxd sql global --format csv "SELECT key,value FROM storage_pools_config JOIN storage_pools ON storage_pools.id = storage_pools_config.storage_pool_id WHERE storage_pools.name = '${poolName}' ORDER BY key")
     echo "Before:"
     echo "${poolConfigBefore}"