fix(@schematics/angular): improve coverage directory handling for Kar… #8362

Job	Run time
build	4m 5s
lint	2m 21s
e2e_windows (windows-2025, 22, npm, 3)	37s
e2e_windows (windows-2025, 22, npm, 1)	29s
e2e_windows (windows-2025, 22, esbuild, 0)	35s
e2e_windows (windows-2025, 22, npm, 5)	37s
e2e_windows (windows-2025, 22, esbuild, 1)	37s
e2e_windows (windows-2025, 22, npm, 4)	33s
e2e_windows (windows-2025, 22, npm, 2)	31s
e2e_windows (windows-2025, 22, esbuild, 2)	32s
e2e_windows (windows-2025, 22, npm, 0)	39s
e2e_windows (windows-2025, 22, esbuild, 4)	39s
e2e_windows (windows-2025, 22, esbuild, 3)	42s
e2e_windows (windows-2025, 22, esbuild, 5)	34s
test	7m 8s
publish-snapshots	4m 49s
Browser Compatibility Tests	7m 5s
e2e-package-managers	1s
e2e-snapshots	1s
e2e	1s
	32m 36s

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