Doc/Michelson: redirect operations on contracts to interactive reference

Context

Answers this part of #4077:

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

The documentation about all the operations on contract in the interactive reference contains that found in the static reference.

Some adjustments:

• CREATE_CONTRACT didn't mention roll-up addresses in the interactive reference: michelson-reference!95 (merged);
• SET_DELEGATE didn't mention roll-up addresses in the interactive reference: michelson-reference!96 (merged);
• CONTRACT was missing a rule in the interactive reference: michelson-reference!98 (merged);
• some documentation was missing for VOTING_POWER in the interactive reference: michelson-reference!99 (merged);
• the documentation of IMPLICIT_ACCOUNT in the static reference has been changed for something closer to the actual implementation.

The inclusion was checked manually by comparing the static and interactive documentations for each type and comparison instruction of the static 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

• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR