Drop fips-checks script from trees

[Magali Lemes do Sacramento]

[Impact]

When producing a new version of some kernels, we need to check for changes that might affect FIPS certs and justify why a commit was kept. For that, we have a fips-checks script that lives under debian/ in Focal, Jammy, Mantic and Noble.

This script has been moved to `cranky`[1], so now there is no need to have this script in the kernel Git trees as well.

[1] https://git.launchpad.net/~canonical-kernel/+git/kteam-tools/commit/?id=2ab9364d4b4c18bee7d835787d7dd11990103bca

[Fix]

Remove the fips-checks script and its calls.

[Test Plan]

Prepare a kernel and ensure that the `cranky close` step runs without any errors.

[Where problems could occur]

This only affects the preparation of FIPS kernels and not the kernel final binary. Moreover, I've prepared some FIPS kernels from the 2024.03.04 cycle relying on `cranky check-fips` to ensure that
we have it working well on the cranky side too.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux/5.4.0-181.201 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal-linux' to 'verification-done-focal-linux'. If the problem still exists, change the tag 'verification-needed-focal-linux' to 'verification-failed-focal-linux'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux/5.15.0-104.114 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux' to 'verification-done-jammy-linux'. If the problem still exists, change the tag 'verification-needed-jammy-linux' to 'verification-failed-jammy-linux'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux/6.5.0-33.33 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-mantic-linux' to 'verification-done-mantic-linux'. If the problem still exists, change the tag 'verification-needed-mantic-linux' to 'verification-failed-mantic-linux'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!