refactor: remove hard coded `'Y-m-d H:i:s'`

[kenjis]

Description See https://github.com/codeigniter4/shield/issues/608 and https://github.com/codeigniter4/CodeIgniter4/pull/8538

Checklist:

• [x] Securely signed commits
• [ ] Component(s) with PHPDoc blocks, only if necessary or adds value
• [ ] Unit testing, with >80% coverage
• [ ] User guide updated
• [x] Conforms to style guide

[kenjis]

I sent PR to fix: https://github.com/codeigniter4/CodeIgniter4/pull/8543

 ------ --------------------------------------------------------------------- 
  Line   src/Controllers/MagicLinkController.php                              
 ------ --------------------------------------------------------------------- 
  108    Parameter #1 $row of method CodeIgniter\Model::insert() expects      
         array<int|string, float|int|string|null>|object|null, array<string,  
         CodeIgniter\I18n\Time|int|string|null> given.                        
 ------ --------------------------------------------------------------------- 

 ------ --------------------------------------------------------------------- 
  Line   src/Models/LoginModel.php                                            
 ------ --------------------------------------------------------------------- 
  77     Parameter #1 $row of method CodeIgniter\Model::insert() expects      
         array<int|string, float|int|string|null>|object|null, array<string,  
         CodeIgniter\I18n\Time|int|string|null> given.                        
 ------ --------------------------------------------------------------------- 

 ------ --------------------------------------------------------------------- 
  Line   src/Models/RememberModel.php                                         
 ------ --------------------------------------------------------------------- 
  58     Parameter #1 $row of method CodeIgniter\Model::insert() expects      
         array<int|string, float|int|string|null>|object|null, array<string,  
         CodeIgniter\I18n\Time|int|string|null> given.                        
 ------ --------------------------------------------------------------------- 

 ------ --------------------------------------------------------------------- 
  Line   tests/Authentication/MagicLinkTest.php                               
 ------ --------------------------------------------------------------------- 
  113    Parameter #1 $row of method CodeIgniter\Model::insert() expects      
         array<int|string, float|int|string|null>|object|null, array<string,  
         CodeIgniter\I18n\Time|int|string|null> given.                        
  135    Parameter #1 $row of method CodeIgniter\Model::insert() expects      
         array<int|string, float|int|string|null>|object|null, array<string,  
         CodeIgniter\I18n\Time|int|string|null> given.                        
 ------ --------------------------------------------------------------------- 

 ------ --------------------------------------------------------------------- 
  Line   tests/Controllers/MagicLinkTest.php                                  
 ------ --------------------------------------------------------------------- 
  102    Parameter #1 $row of method CodeIgniter\Model::insert() expects      
         array<int|string, float|int|string|null>|object|null, array<string,  
         CodeIgniter\I18n\Time|int|string|null> given.                        
 ------ --------------------------------------------------------------------- 

Error:  [ERROR] Found 6 errors

https://github.com/codeigniter4/shield/actions/runs/7895251231/job/21547330117?pr=1027

[kenjis]

dateFormat has been added to CI version 4.5 In contrast, Shield supports version 4.3.5. What effect will these changes have on older versions?

In my understanding, there is no changes. The Time instance that is passed to a Model will be converted to a string with hard coded Y-m-d H:i:s in the Model. See https://github.com/codeigniter4/CodeIgniter4/blob/3595944eac90df7e499403bad8767935c41488d9/system/BaseModel.php#L1316-L1320

[datamweb]

@kenjis thank you!