### Motivation
Basically we use `xonsh --no-rc` to have pure xonsh.
I noticed many times when parent environment can affect `xonsh --no-rc` e.g. `$XONSH_HISTORY_FILE`.
Current workaround is `env -i @$(which xonsh) --no-rc` but I think we need to have pure xonsh way.
Closes#4921
### Before
```xsh
xonsh --no-rc
$QWE = 1
xonsh --no-rc
$QWE
# 1
```
### After
```xsh
xonsh --no-rc
$QWE = 1
xonsh --no-rc --no-env
$QWE
# Unknown environment variable: $QWE
$XONSH_ENV_INHERITED # Marker to have a way to catch this situation.
# False
```
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