fix: apply code coverage exclusion rules to all projects

[wzieba]

Description

This minor PR corrects a mistake introduced in #19936 . As the merged Kover report is configured in the rootProject, we can't configure exclusions using subprojects as it specifically filters out the rootProject.

Instead of allprojects should be used.

Test

Before: report from running koverHtmlReport Gradle task contains hilt_aggregated_deps package

After: report from running koverHtmlReport Gradle task does not contain hilt_aggregated_deps package

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr19956-46d7820
	Commit	46d7820
	Direct Download	jetpack-prototype-build-pr19956-46d7820.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr19956-46d7820
	Commit	46d7820
	Direct Download	wordpress-prototype-build-pr19956-46d7820.apk

Note: Google Login is not supported on these builds.

[tiagomar]

All good!