Doc/Michelson: redirect operations on timelock to interactive reference

Context

Answers this part of #4077:

• delete the parts about instructions from the static reference:
  • Operations on timelock

The documentation about the operations on timelock is added to the interactive reference: michelson-reference!119 (merged).

Note that the typing rule in the static reference was wrong, although the description is correct: the return type of OPEN_CHEST is not or bytes bool but option bytes. This is checked in the description of the merge request in the interactive reference.

Manually testing the MR

make -C docs -j

And then open docs/_build/alpha/michelson.html in a web browser.

Or open the exposed artifacts Documentation - excluding old protocols below, and navigate to docs/_build/alpha/michelson.html.

Checklist

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