Fix flake of TestPipelineTaskTimeout

[lbernick]

Prior to this commit, TestPipelineTaskTimeout was flaky because a Pipeline task that was supposed to succeed timed out. This can happen when the time to create a pod exceeds the timeout, which was 60s.
This commit removes the timeout for that pipeline task, removing this cause of flakes.

/kind flake
closes #6943

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• n/a Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
• Has Tests included if any functionality added or changed
• Follows the commit message standard
• Meets the Tekton contributor standards (including functionality, content, code)
• Has a kind label. You can add one by adding a comment on this PR that contains /kind <type>. Valid types are bug, cleanup, design, documentation, feature, flake, misc, question, tep
• n/a Release notes block below has been updated with any user facing changes (API changes, bug fixes, changes requiring upgrade notices or deprecation warnings). See some examples of good release notes.
• n/a Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

NONE

[JeromeJu]

Thanks @lbernick

[Yongxuanzhang]

/lgtm

It would be helpful if we have descriptive names instead of task1 and task2 😂

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JeromeJu, wlynch

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [wlynch]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment