benchmark: inherit options --rsh --remote-path, fixes #8099

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 82.58%. Comparing base (4abc7f1) to head (5a8a505).

Files	Patch %	Lines
src/borg/archiver.py	75.00%	2 Missing and 2 partials :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## 1.4-maint #8118 +/- ## ============================================= - Coverage 82.63% 82.58% -0.06% ============================================= Files 38 38 Lines 10966 10973 +7 Branches 2098 2100 +2 ============================================= Hits 9062 9062 - Misses 1343 1348 +5 - Partials 561 563 +2 ```

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