Remove deprecated Google Mobile Ads (GMA) C++ SDK #13725

Job	Run time
check_and_prepare	27s
build-tvos-macos-14	1m 18s
build-ios-macos-14	1m 37s
build-desktop-ubuntu-22.04-x64-openssl	54s
build-desktop-windows-latest-x64-openssl	2m 58s
build-android-macos-14	2m 3s
build-android-windows-latest	3m 28s
build-android-ubuntu-22.04	39s
test-tvos-macos-14-tvos_simulator	11s
test-ios-macos-14-ios_target-gameloop	19s
test-ios-macos-14-simulator_target-gameloop	15s
test-desktop-ubuntu-22.04-x64-openssl	7s
test-desktop-windows-latest-x64-openssl	18s
test-android-macos-14-android_target-gameloop	9s
test-android-ubuntu-22.04-emulator_ftl_target-gameloop	14s
test-android-windows-latest-emulator_ftl_target-gameloop	8s
test-android-ubuntu-22.04-android_target-gameloop	9s
test-android-windows-latest-android_target-gameloop	12s
test-android-macos-14-emulator_ftl_target-gameloop	7s
summarize-results	22s
attempt-retry	0s
	15m 55s

Provide feedback