Migrate all Ubuntu images in azure-sdk-tools (including latest) to Ubuntu 22.04

[konrad-jamrozik]

Turns out that when we were migrating to Ubuntu 20.04 from Ubuntu 18.04 we didn't do it everywhere, or we incorrectly added some 18.04 references post-migration, which was done in the PR:

• Update ubuntu VMImage to ubuntu-20.04 #1518

Notably, the archetype-sdk-tool-azure-function.yml wasn't migrated to Ubuntu 20.04, which I recently did in this PR:

• Bump globals.yml .NET SDK version from 3.1.405 to 6.x + assorted changes #4916

In addition, there is a related work where we didn't set Ubuntu image, making it picking up latest, thus leading to issues after "latest" became Ubuntu 22.04:

• The template for prepare-pipelines is broken by the move to ubuntu-22.04 #4888

This work item is about migrating all ubuntu-latest, Ubuntu 18.04 and Ubuntu 20.04 images to 1ES-hosted Ubuntu 22.04 images. More info on how to reference 1ES-hosted pools provided here:

• Introduce "job" version of prepare-pipelines.yml, with "pool" defined to use Ubuntu 20.04 #4930

Note there are separate work items for updating Ubuntu images in other repositories:

• Update Ubuntu images used in all our language and other SDK repos to 22.04, where applicable #5058
• Transition Windows and Ubuntu agent pools to consume 2022-Compliant images #3407

There is also some follow-up work, considered separate from this work item:

• Update and pin Ubuntu images to 22.04 in tools/sdk-generation-pipeline #5178

[konrad-jamrozik]

@weshaggard I am closing this work item as completed. There is a follow-up work for this repo:

• Update and pin Ubuntu images to 22.04 in tools/sdk-generation-pipeline #5178

And for other repos:

• Update Ubuntu images used in all our language and other SDK repos to 22.04, where applicable #5058
• Transition Windows and Ubuntu agent pools to consume 2022-Compliant images #3407