Update CBL-Mariner build prerequisites

[anphel31]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./SPECS/LICENSES-AND-NOTICES/data/licenses.json, ./SPECS/LICENSES-AND-NOTICES/LICENSES-MAP.md, ./SPECS/LICENSES-AND-NOTICES/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

---

Summary

What does the PR accomplish, why was it needed?
Update the documents describing the build machine prerequisites.

Change Log

• Use tdnf instead of dnf to install on Mariner
• Remove python2, bison and gcc from Mariner prereqs
• Remove python-minimal and bison from Ubuntu prereqs

Does this affect the toolchain?

NO

Test Methodology

• Manual builds on Azure virtual machines using the images and script below.

Mariner test image: (note: some additional parameters are used as well, such as --admin-username and --ssh-key-values)

az vm create --image MicrosoftCBLMariner:CBL-Mariner:cbl-mariner-2-gen2:latest --size Standard_D16ds_v5 --os-disk-size-gb 120 --public-ip-sku Standard

Ubuntu test image:

az vm create --image Canonical:UbuntuServer:18.04-LTS:latest --size Standard_D16ds_v5 --os-disk-size-gb 120 --public-ip-sku Standard

Test build:

mkdir mariner-2 && cd mariner-2
git clone -b 2.0-stable https://github.com/microsoft/CBL-Mariner.git --depth 1
cd CBL-Mariner/toolkit

sudo make go-tools REBUILD_TOOLS=y

sudo make toolchain REBUILD_TOOLS=y REBUILD_TOOLCHAIN=y 2>&1 | tee ./toolchain.log

sudo make build-packages SRPM_PACK_LIST="tree" REBUILD_TOOLS=y
sudo make image CONFIG_FILE=./imageconfigs/core-efi.json REBUILD_TOOLS=y SRPM_PACK_LIST="tree" REFRESH_WORKER_CHROOT=n
sudo make iso CONFIG_FILE=./imageconfigs/full.json REBUILD_TOOLS=y SRPM_PACK_LIST="tree" REFRESH_WORKER_CHROOT=n

[mfrw]

LGTM :)