PTFE-1491 Support vsphere as a backend

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.96296% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 85.92%. Comparing base (b8b0d33) to head (62e6a17).

Files	Patch %	Lines
runner_manager/backend/vsphere.py	86.31%	13 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #549 +/- ## ========================================== - Coverage 85.98% 85.92% -0.07% ========================================== Files 31 32 +1 Lines 1249 1357 +108 ========================================== + Hits 1074 1166 +92 - Misses 175 191 +16 ``` | [Flag](https://app.codecov.io/gh/scality/runner-manager/pull/549/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scality) | Coverage Δ | | |---|---|---| | [api](https://app.codecov.io/gh/scality/runner-manager/pull/549/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scality) | `64.25% <36.11%> (-2.44%)` | :arrow_down: | | [unit](https://app.codecov.io/gh/scality/runner-manager/pull/549/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scality) | `68.31% <36.11%> (-3.03%)` | :arrow_down: | | [vsphere](https://app.codecov.io/gh/scality/runner-manager/pull/549/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scality) | `40.30% <87.96%> (?)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scality#carryforward-flags-in-the-pull-request-comment) to find out more.

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