[BugFix] Fix "done" instead of "terminated" mistakes

[MarCnu]

Description

3 fixes
Fix twice an initialisation of terminated using tensordict.get(done).

Fix a call of function with parameter "terminated=done"

Motivation and Context

Most likely a copy pasting mistake during the terminated/done refactor

Types of changes

What types of changes does your code introduce? Remove all that do not apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds core functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)
• Example (update in the folder of examples)

Checklist

Go over all the following points, and put an x in all the boxes that apply.
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• I have read the CONTRIBUTION guide (required)
• My change requires a change to the documentation.
• I have updated the tests accordingly (required for a bug fix or a new feature).
• I have updated the documentation accordingly.

[vmoens]

LGTM let's wait for the tests to pass!

[vmoens]

The broken tests are either flaky (gym vec envs), known to be broken (habitat) or passing locally (exmples)