NOT READY(collection_tools): Implement use_alloc feature, cover with tests.

[YBoy-git]

// zzz : qqq : rid off #[ cfg( not( feature = "use_alloc" ) ) ]
// qqq : xxx : does not work for use_alloc, make it working

• Implement use_alloc feature
• Cover with tests

[wtools-bot]

To maintain stability of the module the repository uses 3-stages system to forward changes from an unstable branch to a stable.
The unstable branch is alpha. All user pull requests should be opened to this branch.
The staging branch is beta. Changes to this branch are forwarded by a pull request from branch alpha automatically.
The stable branch is master. Changes to this branch are forwarded by a pull request from branch beta automatically.

The pull request was automatically converted to draft.
Please, change base branch taking into account the described system alpha -> beta -> master.