feat: Backwards compatibility for flags

[bitdivine]

Description

The location of some flags has moved. For example:

Old: dfx canister --network local id mydapp
New: dfx canister id --network local mydapp

This is quite disruptive, as it breaks almost every script that uses dfx.

This PR implements backwards-compatibility by accepting the old format in a few common cases. It does not attempt to cover all possible situations where we know how to rewrite from the old syntax to the new. It removes 90% of the pain with 10% of the code.

Alternatives considered

Update all the code. This would however break any case where say sns was used with an older version of dfx. Also, updating to this latest dfx would break our CI in many places and I doubt we could fix it all at once.

How Has This Been Tested?

I have used this for an SNS deployment, as that uses quite a few scripts in our inventory, as well as the sns binary which has calls to dfx baked into the code.

If this general approach seems OK I am happy to write bash tests as well.

Checklist:

• The title of this PR complies with Conventional Commits.
• I have edited the CHANGELOG accordingly.
• I have made corresponding changes to the documentation.

[ghost]

Closing because #2521 has made the changes in a backwards-compatible way.