[REF] po-syntax-error: Use the line with syntax error

[moylop260]

Improve the po-syntax-error message output in order to set the line number correctly:

- test_repo/syntax_err_module/i18n/es.po:1: po-syntax-error Syntax error in po file (line 19)
+ test_repo/syntax_err_module/i18n/es.po:9: po-syntax-error Syntax error in po file

So, extract the number of line if exists in the message and remove that part of the message, if not using 1 the following line is:

• https://github.com/OCA/odoo-pre-commit-hooks/blob/2510c73208e208d5895d4855f5f79c4c34954501/src/oca_pre_commit_hooks/checks_odoo_module_po.py#L120