ftjam: migrate to Conan v2

[valgur]

No description provided.

[conan-center-bot]

Conan v1 pipeline ❌

Sorry, the system is under maintenance and it doesn't accept builds right now.
Please, check https://status.conan.io to obtain more information.
Thanks for your understanding and help with the Conan Center Index!

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Conan v2 pipeline ❌

Note: Conan v2 builds may be required once they are on the v2 ready list

The v2 pipeline failed. Please, review the errors and note this will be required for pull requests to be merged in the near future.

See details:

Sorry, the system is under maintenance and it doesn't accept builds right now.
Please, check https://status.conan.io to obtain more information.
Thanks for your understanding and help with the Conan Center Index!

[valgur]

Closing temporarily to avoid unnecessary load on the CI. Will reopen when I'm actively working on the PR again.

[valgur]

Re-opened as #19238 due to rebased history.