[Doctrine] Doctrine ssl connection mysql

[lacatoire]

Added SSL configuration example for MySQL in Doctrine DBAL

• Included YAML and XML configuration examples for setting up an SSL connection with MySQL using Doctrine DBAL in Symfony.
• Explained how to use environment variables for specifying SSL certificate paths (MYSQL_SSL_KEY, MYSQL_SSL_CERT, MYSQL_SSL_CA).
• Added a note on configuring the .env.local or .env.local.php files with the appropriate certificate paths.

[javiereguiluz]

@lacpandore thanks for this contribution. I'm trying to merge it but I'm seeing a long list of merge conflicts while doing that.

So, could you please squash your commits? (See this squashing guide if you need it: https://gist.github.com/lpranam/4ae996b0a4bc37448dc80356efbca7fa) Thanks!

[xabbuh]

@lacpandore You need to rebase your branch to get rid of the merge commits.