[FIX] core: use non-breaking space for currency symbol

In some languages and layout the currency symbol might be wrapped in a separate
line, which is not acceptable from accounting point of view. Fix it by replacing
space with a special symbol.

STEPS for v15:
* install MX localization;
* create a Spanish speaking customer
* generate a pdf:
1) Create quotation with products
2) Add IVA 16%tax
3) print a report

BEFORE: the currency symbol is incorrectly displayed on a separate line
AFTER:  currency symbol is always with the amount

---

https://github.com/odoo/odoo/pull/89722


opw-2829138

closes odoo/odoo#90961

X-original-commit: 684687226b87022bc9f9ba7667b295e545100645
Related: odoo/enterprise#27138
Signed-off-by: William André (wan) <wan@odoo.com>