Only use the context key for enabling the "swift.switchPlatform" command #991

Job	Run time
Package Extension	2m 13s
Test / Linux (5.9 - jammy)	4m 41s
Test / Linux (5.10 - jammy)	4m 42s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Test / Linux (6.0 - jammy)	6m 55s
Test / Linux (6.1 - jammy)	6m 2s
Test / Windows (5.9 - windows-2022)	12m 37s
Test / Windows (6.0 - windows-2022)	28m 4s
Test / Windows (6.1 - windows-2022)	17m 21s
Soundness / Broken symlinks check	3s
Soundness / Documentation check	0s
Soundness / API breakage check	0s
Soundness / Format check	0s
Soundness / License headers check	0s
Soundness / Python lint check	7s
Soundness / Unacceptable language check	2s
Soundness / Shell check	30s
Soundness / YAML lint check	5s
	1h 23m 22s

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