update desktop runner to include WINDIR as env var #3942

Job	Run time
launcher (ubuntu-20.04)	3m 55s
launcher (ubuntu-20.04)	4m 7s
package_builder (ubuntu-20.04)	42s
package_builder (ubuntu-20.04)	42s
launcher (macos-12)	6m 36s
launcher (macos-12)	6m 36s
package_builder (macos-12)	1m 54s
package_builder (macos-12)	1m 54s
launcher (windows-latest)	5m 45s
launcher (windows-latest)	5m 45s
package_builder (windows-latest)	1m 34s
package_builder (windows-latest)	1m 34s
Exec Test	0s
Store Artifacts	0s
ci_mergeable	0s
ci_mergeable	1s
Exec Test (ubuntu-20.04)	7s
Exec Test (ubuntu-22.04)	9s
Exec Test (macos-11)	19s
Exec Test (macos-12)	19s
Exec Test (macos-13)	19s
Exec Test (windows-2019)	17s
Exec Test (windows-2022)	14s
Store Artifacts (linux)	15s
Store Artifacts (macos)	42s
Store Artifacts (windows)	15s
	44m 1s

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