[#66] Rename command optimization

[DK318]

Description

Problem

At this moment rename command reuses delete command, so we do some unnecessary actions like getEntryOrDirThrow.

Solution

Replaced deleteCmd call with deleteSecret.

Related issue(s)

• Fixes #66

Fixed #

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Related changes (conditional)

• Tests

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  • [ ] If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

• Documentation

  • [x] I checked whether I should update the docs and did so if necessary:
  • README
  • Haddock

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• [x] My commits comply with the policy used in Serokell.
• [x] My code complies with the style guide.