Giza olympia fix bundled video creation and nft issuance

[dobertRowneySr]

fixes:

• Bundled video creation and nft issuance  #3107
• Bundled NFT issuance and setting initial NFT state #3106

I also removed all the unused code like PersonId and the likes that was not removed this far, in order to have cleaner type aliases

Update 2022-02-02: rebased to current olympia . This lead to a larger number of commits
Relevant comits start from : c86b9dd
Relevant code section are in the content module, in particular:

• NFTIssuanceParameter type introduced
• InitTransactionalStatus type introduced
• ensure_valid_init_transactional_status guard added
• create_video & issue_nft extrinsic argument modified

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[dobertRowneySr]

The underlying issues look addressed. However, there are multiple issues with the code:

* no doc-comments for public types, extrinsics, and methods

* please, remove `allow all` clippy warning statement and fix all clippy issues in the pallet

* found this line in the code: `// TODO: Solve #now`

* rebase seems unsuccessful: 1) there is still unrelated code in the PR (removed empty extrinsics), 2) `generate_weights.sh` script fails now (incorrect benchmark name)

* there are public methods with no external usage (should be private)

• the TODO was an old reference to myself that I solved and forgot to remove
• benchmark should be fixed
• removed the cargo directive
• added doc-comments on types and helper functions added

I could locate the removed_empty_extrinsic reference in the Github commit tab

[shamil-gadelshin]

Isn't it a rebase artifact?

[dobertRowneySr]

I am not following. The BASE commit in olympia has this code. In this PR that I am opening I removed it

[shamil-gadelshin]

Ok. So, it's part of the PR. I was expecting only the NFT-related code.

[shamil-gadelshin]

LGTM