Add workflows for run SDK and BTCLI tests if labels are applied

[basfroman]

Context:

• when opening or re-opening a PR (for devnet-ready, devnet, testnet, testnet-ready or main branches), the jobs checking and adding labels to run SDK (run-bittensor-sdk-tests) and CLI (run-bittensor-cli-tests) tests is launched.
• if labels are added, then the corresponding SDK and CLI tests are running when committing, re-opening a PR or when adding a label (after deleting it earlier).
• each time when labels added or removed checkers re-starts
• all tests are splitted into separate processes. if you got a flaky test, you can restart only it