fix(@schematics/angular): improve coverage directory handling for Kar… #8363

Job	Run time
build	3m 32s
lint	2m 20s
e2e_windows (windows-2025, 22, npm, 1)	43s
e2e_windows (windows-2025, 22, npm, 0)	53s
e2e_windows (windows-2025, 22, npm, 4)	30s
e2e_windows (windows-2025, 22, npm, 2)	35s
e2e_windows (windows-2025, 22, npm, 5)	44s
e2e_windows (windows-2025, 22, esbuild, 1)	30s
e2e_windows (windows-2025, 22, esbuild, 2)	45s
e2e_windows (windows-2025, 22, esbuild, 5)	36s
e2e_windows (windows-2025, 22, esbuild, 0)	37s
e2e_windows (windows-2025, 22, npm, 3)	44s
e2e_windows (windows-2025, 22, esbuild, 3)	35s
e2e_windows (windows-2025, 22, esbuild, 4)	33s
Browser Compatibility Tests	2m 59s
publish-snapshots	2m 58s
test	2m 15s
e2e-package-managers	1s
e2e-snapshots	1s
e2e	1s
	21m 52s

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