Toloka-kit

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Python versions support:
* Python 3.7 support dropped

Changes:
* Updated `TolokaClient.create_app_items` and `AsyncTolokaClient.create_app_items` to return the list of created app
items ids.
* Added `tier` parameter to `TolokaClient.create_pool` and `AsyncTolokaClient.create_pool` methods.

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Bugfixes:
* Fixed OAuth authorization header generation.

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Changes:
* Changed streaming cursors behavior: now events are processed not sooner than `time_lag` seconds after they were
created. This parameter is configurable, but it is not recommended to decrease the default value of 1 minute as this
can lead to some events being skipped. This change affects streaming cursors, cursor-based streaming observers, and
some cursor-based metric collectors.

Features:
* Supported SSO authorization tokens.
* Added Python 3.11 support
* `TolokaClient.create_task`, `TolokaClient.create_task_suite` and `TolokaClient.create_user_bonus` now support
`operation_id` parameter.

Fixes:
* `TolokaClient.create_task`, `TolokaClient.create_task_suite`, `TolokaClient.create_user_bonus` and
`TolokaClient.create_user_bonus` can be safely retried now (previously they could create duplicate items in case of
an unstable connection).
* Previously `AsyncTolokaClient` could not outlive the asyncio event loop which was used during the first API call,
which lead to an inability to pickle `AsyncTolokaClient`. Now `AsyncTolokaClient` survives asyncio event loop change.
* `TolokaClient` and `AsyncTolokaClient` follows `urllib3` retrying behavior more closely in case of the `Retry` object
being passed to the `retry` or `retryer_factory` parameters.
* Previously streaming cursors could skip some Toloka events when fetching them from the API concurrently with them
being created. Now streaming cursors utilize time lag to prevent such concurrent reads.

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Features:
* Added `verify` parameter to `TolokaClient` and `AsyncTolokaClient`. This parameter controls SSL certificate verification settings.

Bugfixes:
* Fixed deserialization of legacy Toloka projects bug which was caused by an attempt to parse view spec with empty `lock` field.

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Bugfixes:
* Removed upper bound on `cattrs` version.
* While structuring objects with unknown `spec_value` corresponding classes are generated in runtime now. Thus objects like filters, rule actions and others that are not fully documented in api/experimental/removed in past from toloka-kit could be safely structured now.

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Bugfixes:
* Methods for the batch creation of tasks, task suites or user bonuses could create duplicate items in case of unstable connection:
* `TolokaClient.create_tasks_async`, `TolokaClient.create_task_suites_async` and `TolokaClient.create_user_bonuses_async` as well as `TolokaClient.create_tasks`, `TolokaClient.create_task_suites` with `async_mode=True` now guaranteed to create not more than one batch of items for a single function call.
* `TolokaClient.create_user_bonuses` and `TolokaClient.create_user_bonus` are guaranteed to create not more than one batch of items for a single function call but may raise an exception if there was an attempt to create the same batch of items for the second time due to the unstable connection.