[FIX] l10n_eu_oss: Create OSS account with correct tags

Bugfix. When installing l10n_eu_oss with l10n_de_skr03, an OSS account
'17010 Unsatzsteuer 19% OSS' is created. However, this account has
no account tags set on it, so it gets left out from the Balance Sheet
report. (Note that in Germany, due to there being two CoAs, the Balance
Sheet report still works using account tags.)

The solution: when creating the OSS account, re-use the account tags
of the account we are copying.

closes odoo/odoo#130185

Signed-off-by: John Laterre (jol) <jol@odoo.com>