[FW][FIX] formula assistant: localize argument separator

[fw-bot]

Description

The argument separator in the formula assistant was not localized, it was always a comma no matter the locale. This commit fixes it.

Task: : 3789860

review checklist

• feature is organized in plugin, or UI components
• support of duplicate sheet (deep copy)
• in model/core: ranges are Range object, and can be adapted (adaptRanges)
• in model/UI: ranges are strings (to show the user)
• undo-able commands (uses this.history.update)
• multiuser-able commands (has inverse commands and transformations where needed)
• new/updated/removed commands are documented
• exportable in excel
• translations (_t("qmsdf %s", abc))
• unit tested
• clean commented code
• track breaking changes
• doc is rebuild (npm run doc)
• status is correct in Odoo

Forward-Port-Of: #3790

[robodoo]

Pull request status dashboard.

[fw-bot]

@hokolomopo @LucasLefevre cherrypicking of pull request #3790 failed.

stdout:

Auto-merging src/components/composer/formula_assistant/formula_assistant.ts
CONFLICT (content): Merge conflict in src/components/composer/formula_assistant/formula_assistant.ts
Auto-merging src/components/composer/formula_assistant/formula_assistant.xml
Auto-merging tests/composer/formula_assistant_component.test.ts
CONFLICT (content): Merge conflict in tests/composer/formula_assistant_component.test.ts

stderr:

15:36:23.976517 git.c:463               trace: built-in: git cherry-pick 6e582424488dda5df1df8404ea0ea9e2d2f73c6a
error: could not apply 6e5824244... [FIX] formula assistant: localize argument separator
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
----------
status:

Either perform the forward-port manually (and push to this branch, proceeding as usual) or close this PR (maybe?).

In the former case, you may want to edit this PR message as well.

⚠️ after resolving this conflict, you will need to merge it via @robodoo.

More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port

[hokolomopo]

@robodoo r+