github-actions: set default permissions set at the top level #162

Job	Run time
build-php-deps / build-php-dependencies	1m 24s
test-sources-license / test-sources-license	6s
build-native / setup-build-matrix / setup-build-matrix	1s
build-native / build-agent-library (linux-x86-64, amd64, deb rpm)	6m 29s
build-native / build-agent-library (linuxmusl-x86-64, amd64, apk)	5m 58s
build-native / build-agent-library (linux-arm64, arm64, deb rpm)	7m 37s
build-native / build-agent-library (linuxmusl-arm64, arm64, apk)	7m 39s
build-packages / setup-build-matrix / setup-build-matrix	1s
tests-phpt / setup-build-matrix / setup-build-matrix	1s
tests-phpt / test-phpt (linux-x86-64, amd64, deb rpm)	42s
tests-phpt / test-phpt (linuxmusl-x86-64, amd64, apk)	20s
tests-phpt / test-phpt (linux-arm64, arm64, deb rpm)	34s
tests-phpt / test-phpt (linuxmusl-arm64, arm64, apk)	29s
build-packages / build-packages (linux-x86-64, amd64, deb rpm)	51s
build-packages / build-packages (linuxmusl-x86-64, amd64, apk)	27s
build-packages / build-packages (linux-arm64, arm64, deb rpm)	1m 2s
build-packages / build-packages (linuxmusl-arm64, arm64, apk)	27s
ci	1s
	34m 9s

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