Add manual build for 7.4, 8.0 and 8.1 #554

Job	Run time
Test 8.4-apache amd64 only	2s
Test 8.3-cli arm64 only	1s
Test 8.4-fpm amd64 only	3s
Test 8.2-apache arm64 only	2s
Test 8.4-apache arm64 only	2s
Test 8.4-cli amd64 only	4s
Test 8.3-fpm arm64 only	5s
Test 8.4-cli arm64 only	2s
Test 8.3-fpm amd64 only	2s
Test 8.2-cli amd64 only	4s
Test 8.4-fpm arm64 only	1s
Test 8.2-apache amd64 only	4s
Test 8.2-cli arm64 only	4s
Test 8.3-apache arm64 only	1s
Test 8.1-fpm amd64 only	3s
Test 8.3-cli amd64 only	4s
Test 8.1-apache arm64 only	2s
Test 8.2-fpm arm64 only	1s
Test 8.1-apache amd64 only	6s
Test 8.3-apache amd64 only	2s
Test 8.1-fpm arm64 only	1s
Test 8.1-cli amd64 only	1s
Test 8.2-fpm amd64 only	1s
Test 8.1-cli arm64 only	1s
Publish ${{ matrix.php_version }}-${{ matrix.variant }} multi-arch to dockerhub	1s
	1m 0s

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