Add support for ubi9, ubi9-minimal

[adarshan-intel]

Description of the changes

Add support for ubi9, ubi9-minimal

How to test this PR?

To test this PR, set follow similar procedure as followed with Ubuntu and do gsc build and signing commands.

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This change is 

[adarshan-intel]

@jkr0103 and @anjalirai-intel Please review

[adarshan-intel]

templates/redhat/ubi-minimal/Dockerfile.build.template line 4 at r4 (raw file):

Previously, dimakuv (Dmitrii Kuvaiskii) wrote…

Note for other reviewers: this is a smart trick for splitting UBI-minimal. Note how `-` is used as a separator instead of `:` for UBI. That's because we need to extract the major version, and the distro name for UBI-minimal is `redhat/ubi9-minimal:9.4`. Whereas for UBI it is `redhat/ubi9:9.4`.

Thanks, this was the easier solution

[adarshan-intel]

Previously, dimakuv (Dmitrii Kuvaiskii) wrote…

The PR looks good to me. Waiting for reviews from others. TODO for myself: need to test it when all reviews are done.

Thanks

[adarshan-intel]

There is an option in gsc where you can just build gramine, and build workload image later, When I tried to build just gramine, it failed with error distro is not supported by GSC

Config.yaml Distro: "redhat/ubi9:9.4"

Steps to Reproduce ./gsc build-gramine bash_test Building base-Gramine Docker image bash_test... redhat/ubi9 distro is not supported by GSC.

The latest commits are addressing that issue. - https://github.com/gramineproject/gsc/pull/207/commits/747a51a71f2955dba74177d8c34b481c9f70c20e

[adarshan-intel]

templates/redhat/ubi/Dockerfile.build.template line 5 at r8 (raw file):

Previously, mkow (Michał Kowalczyk) wrote…

https://reviewable.io/reviews/gramineproject/gsc/207#-O21tXbL0TQQJ8fIYQol

Done. Implemented the regex_match function to validate regular expressions across various templates.