[FIX] website_form: prevent crashing while parsing python dict in JS

__Description of the issue:__
- The `replace` method in JS only replace the first occurrence of a
string (unless `g` flag is used in the regex)
- There could be an apostrophe (`‘`) in a string value which would be
replaced by a quote (`“`)
- There could be “None”, “False” in a string value which would be
replaced too
- “True” is not taken into account

__Description of the fix:__
Those regex are meant to deal with more edge cases when transforming a
python dict to a JSON in JS. However there are still ways it could go
wrong. For the forward port in master, it could be a good idea to
consider converting dictionnaries directly in the backend using the
`json` python library.

__Steps to reproduce the issue:__
1. Edit the view `website.contactus`
(If `website_crm` is installed, either uninstall it or disable the
`website_crm.contactus_form` view)
2. At line 5, change the attribute `t-att-data-values` to a more
complicated dict like:
```
"{'email_to': res_company.email, 'name': 'Alice True', 'age': None, 'active': True, 'attr1': None , 'attr2': False , 'attr3': 'let\'s go'}"
```
3. Go to `/contactus` on the website
↳ Traceback

opw-3328690
task-3340946

closes odoo/odoo#128127

X-original-commit: 5360e10dcd89bdbae6d01a0f6597571c8592301f
Signed-off-by: Romain Derie (rde) <rde@odoo.com>

addons/website/static/src/snippets/s_website_form/000.js

@@ -140,9 +140,14 @@
             if (!this.editTranslations && (dataForEl || Object.keys(this.preFillValues).length)) {
                 const dataForValues = dataForEl ?
                     JSON.parse(dataForEl.dataset.values
-                        .replace('False', '""')
-                        .replace('None', '""')
-                        .replace(/'/g, '"')
+                        // replaces `True` by `true` if they are after `,` or `:` or `[`
+                        .replace(/([,:\[]\s*)True/g, '$1true')
+                        // replaces `False` and `None` by `""` if they are after `,` or `:` or `[`
+                        .replace(/([,:\[]\s*)(False|None)/g, '$1""')
+                        // replaces the `'` by `"` if they are before `,` or `:` or `]` or `}`
+                        .replace(/'(\s*[,:\]}])/g, '"$1')
+                        // replaces the `'` by `"` if they are after `{` or `[` or `,` or `:`
+                        .replace(/([{\[:,]\s*)'/g, '$1"')
                     ) : {};
                 const fieldNames = this.$el.serializeArray().map(el => el.name);
                 // All types of inputs do not have a value property (eg:hidden),