Add support of capacity provider strategy for ECSOperator

[pavelhlushchanka]

This PR adds support of support of capacity provider strategy for ECSOperator. The logic is based on ECS.Client.run_task documentation.

Closes #8381

Note:
There is a logic related to the platform_version that I find tricky:

            if self.launch_type == 'FARGATE':
                run_opts['platformVersion'] = self.platform_version

As for me, the operator should pass to the run_task every parameter that user provided. And that should be responsibility of the user to think about which parameters and under which conditions are needed. But to be consistent with the logic, I also provide platform_version if capacity_provider_strategy is specified. capacity_provider_strategy can be used only with Fargate, so the platform version should be passed as well. But as we can see, picking the parameters introduces an unnecessary complexity.

[github-actions]

The Workflow run is cancelling this PR. It has some failed jobs matching ^Pylint$,^Static checks,^Build docs$,^Spell check docs$,^Provider packages,^Checks: Helm tests$,^Test OpenAPI*.

[pavelhlushchanka]

@feluelle could you please have a look if anything else needs to be done? Thanks.

[potiuk]

Can you please rebase it to latest main. I think there was an unrelated error when run last time

[pavelhlushchanka]

@potiuk done

[potiuk]

Unrelated pylint error (to be fixed in #16405

[github-actions]

The PR is likely OK to be merged with just subset of tests for default Python and Database versions without running the full matrix of tests, because it does not modify the core of Airflow. If the committers decide that the full tests matrix is needed, they will add the label 'full tests needed'. Then you should rebase to the latest main or amend the last commit of the PR, and push it with --force-with-lease.