Don't wait for close future if the task is cancelled #224

Job	Run time
Construct integration matrix	5s
Soundness / Swift license headers check	6s
Cxx Interop / Construct Cxx interop matrix	6s
Unit Tests / Construct unit test matrix	5s
Release builds / Construct release build matrix	5s
Soundness / API breakage check	6m 48s
Soundness / Unacceptable language check	5s
Soundness / License headers check	4s
Soundness / Format check	39s
Soundness / Shell check	35s
Soundness / Documentation check	4m 58s
Soundness / Broken symlinks check	3s
Soundness / YAML lint check	6s
Soundness / Python lint check	11s
Static SDK / Static SDK / Linux (main Jammy)	6m 54s
Static SDK / Static SDK / Linux (latest-release Jammy)	5m 4s
Release builds / Release builds / Linux (6.0)	5m 27s
Release builds / Release builds / Linux (nightly-next)	7m 3s
Release builds / Release builds / Linux (6.1)	5m 36s
Release builds / Release builds / Linux (nightly-main)	6m 58s
Unit Tests / Unit tests / Linux (6.1)	4m 20s
Unit Tests / Unit tests / Linux (nightly-main)	5m 35s
Unit Tests / Unit tests / Linux (6.0)	4m 45s
Unit Tests / Unit tests / Linux (nightly-next)	5m 33s
Cxx Interop / Cxx interop / Linux (6.0)	4m 14s
Cxx Interop / Cxx interop / Linux (nightly-next)	5m 19s
Cxx Interop / Cxx interop / Linux (nightly-main)	5m 31s
Cxx Interop / Cxx interop / Linux (6.1)	4m 13s
Integration Tests / Linux (nightly-main)	12m 47s
Integration Tests / Linux (6.0)	10m 6s
Integration Tests / Linux (6.1)	9m 55s
Integration Tests / Linux (nightly-next)	13m 16s
	2h 16m 32s

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