Add getInvoicesCollection

[luigifab]

Description

This PR is useless, it add $order->getInvoicesCollection() as an alias for getInvoiceCollection().
Like getShipmentsCollection(), getCreditmemosCollection() and getTracksCollection().

OpenMage 20.0.16 / PHP 8.0.25

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[fballiano]

I've checked in the codebase and all of the "getSomethingCollection" method has a singular naming, so I wouldn't merge this specific PR since it would be the exception, sorry.

[elidrissidev]

I've checked in the codebase and all of the "getSomethingCollection" method has a singular naming

I see the opposite:

magento-lts/app/code/core/Mage/Sales/Model/Order.php

Line 2117 in fb83729

public function getInvoiceCollection()

magento-lts/app/code/core/Mage/Sales/Model/Order.php

Line 2137 in fb83729

public function getShipmentsCollection()

magento-lts/app/code/core/Mage/Sales/Model/Order.php

Line 2156 in fb83729

public function getCreditmemosCollection()

magento-lts/app/code/core/Mage/Sales/Model/Order.php

Line 2175 in fb83729

public function getTracksCollection()

[fballiano]

I guess it's random then :-D

[sreichel]

Fixed conflict.

[github-actions]

Unit Test Results

1 files  ±0  1 suites  ±0   0s ⏱️ ±0s
0 tests ±0  0 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
7 runs  ±0  5 ✔️ ±0  2 💤 ±0  0 ❌ ±0 

Results for commit a6f8323. ± Comparison against base commit 5e04bdb.