Fix missing Yoda Conditions

[debarghyabanerjee]

I noticed that Yoda conditions are not consistently used. This oversight appears in several areas of the codebase. It is important to address these inconsistencies to align with the coding standards and best practices.

I am mentioning the files, where I have encountered these missing Yoda conditions, however there can be more instances as well.

wp-admin/includes/misc.php
wp-admin/includes/upgrade.php
wp-admin/menu-header.php
wp-admin/update-core.php
wp-includes/blocks.php
wp-includes/class-wp-query.php
wp-includes/class-wpdb.php
wp-includes/formatting.php
wp-includes/functions.php
wp-includes/meta.php
wp-includes/ms-load.php
wp-includes/rest-api.php
wp-includes/template.php
wp-login.php

Trac Ticket: Core-62033

## Problem Statement

• During a recent review of the codebase, it was observed that several comparison statements are missing Yoda conditions. This inconsistency may affect readability and increase the risk of errors due to potential assignment mistakes.

## Solution

• This PR addresses the issue by refactoring the code to include Yoda conditions where appropriate. Specifically, I have updated comparison statements to ensure that constants are placed on the left side of comparisons, in line with the coding standards.

## Changes Made

• Updated comparison statements to use Yoda conditions.

• Ensured that all modifications are thoroughly tested to maintain code functionality.

## Impact

• Improved readability and consistency in the codebase.

• Reduced risk of assignment errors in comparison statements.

[jrf]

@debarghyabanerjee While I understand and appreciate your wish to improve WordPress, in none of the cases you flagged Yoda conditions are needed as none of these conditions do a comparison with a variable.
The patch would only decrease code readability for no benefit.

Also see: ​https://developer.wordpress.org/coding-standards/wordpress-coding-standards/php/#yoda-conditions

This patch should not be applied as none of these comparisons involve a variable.