[FIX] *: avoid muting res.users().context_get return

Some code modify return of res.users().context_get, but this is a
cached method so this will unexpectedly affects totally unrelated code.

For example, changing the company with the company switcher could add
`allowed_company_ids` inside the cache, then it will be cached until the
server is restarted, even if we change company again inbetween.

Added test failed with:

"NotImplementedError: '__setitem__' not supported on frozendict"

on the line with `User = User.with_context(context)` where User already
contained `allowed_company_ids` in its context.

note:

in this forward-port, context_get is also changed to return frozendict
and prevent being able to have an unexpected issue by code that modify
context_get returns.

opw-2158340
closes #42465

closes odoo/odoo#42723

X-original-commit: 5d69885c1cd6921b3de00aae7e0ed6fff243ff95
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

0 files changed, 0 insertions, 0 deletions