ci: fix npm install step for e2e build-apps job on branch builds (#3530) #15827

Job	Run time
Install and cache dependencies	36s
Build, code coverage unit tests, and linting	1m 19s
Bootup Nx Cloud agent (2)	1m 27s
Bootup Nx Cloud agent (3)	1m 26s
Bootup Nx Cloud agent (1)	1m 26s
Check formatting	37s
Check dependencies and resources	1m 35s
Build packages distribution	6m 22s
Build	3s
Lint	2s
Code coverage	1s
Stop Nx Cloud agents	1s
	14m 55s

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