fix(alma): skip modular package because MODULARITYLABEL is not set

[MaineK00n]

Since the MODULARITYLABEL is not set, it will not be able to detect the Modular Package correctly.
Therefore, it will skip the Modular Package.

refs:

• Support for AlmaLinux #1021 (comment)
• https://bugs.almalinux.org/view.php?id=173

$ trivy image trivy-test:alma8
2022-01-13T23:48:34.076+0900	INFO	Detected OS: alma
2022-01-13T23:48:34.076+0900	INFO	Detecting AlmaLinux vulnerabilities...
2022-01-13T23:48:34.078+0900	INFO	Skipped detection of these packages: ["httpd" "httpd-filesystem" "httpd-tools" "mod_http2" "mysql" "mysql-common" "nginx" "nginx-all-modules" "nginx-filesystem" "nginx-mod-http-image-filter" "nginx-mod-http-perl" "nginx-mod-http-xslt-filter" "nginx-mod-mail" "nginx-mod-stream" "perl-IO-Socket-SSL" "perl-Mozilla-CA" "perl-Net-SSLeay" "php" "php-cli" "php-common" "php-fpm"] because modular packages cannot be detected correctly due to a bug in AlmaLinux. See also: https://bugs.almalinux.org/view.php?id=173
2022-01-13T23:48:34.078+0900	INFO	Number of language-specific files: 0

[knqyf263]

Thanks!