fix(sdk): Resolves issue when using ParallelFor with param and depending tasks

[mai-nakagawa]

Description of your changes:

Fixes: #10592.

compiler_utils.get_dependencies function validates name attribute each task in _channel_inputs. The bug is that it tries to retrieve the name attribute even if the task is None.

A similar fix was already introduced in another PR #11476. However, the contributor has not responded to the requests to rebase and to add tests for months.

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[google-oss-prow]

Hi @mai-nakagawa. Thanks for your PR.

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[zazulam]

/ok-to-test

[zazulam]

Thanks for following up on this
/lgtm

[hbelmiro]

Thank you @mai-nakagawa.

/lgtm

cc @mprahl

[mprahl]

/approve
/lgtm

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mprahl

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