Avoided unnecessary calls to string translation methods for catalog/sales rules labels

[luigifab]

Description

This PR stop translations of rules labels from frontend.
Perhaps the best way is to remove all translations from model, and translate only from blocks? I don't know.

Here a before/after with Blackfire with a cart with ~50 products (simple, configurable, bundles):

original (before):

after without the static property:

after:

Can fix partially #3127 or not.
Tested with PHP 8.0 and 8.2 with OM rc2.

If you have others modules or custom dev, that do the same, you need to update your files to have better performance on your website. Example with HiPay module's.

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[fballiano]

wow, I wasn't expecting the __ to generate all those calls, I thought it would immediately hit a cache :\

[joshua-bn]

Does it make any difference for time?

[fballiano]

if I read the screenshots correctly it goes from 5secs to 3.6secs (with @luigifab's DB data obviously)