Enable components to declare compatible platforms.

[dblock]

Signed-off-by: dblock [email protected]

Description

• Enable components to declare compatible platforms, defaults to all.
• Exclude incompatible components during build.
• Raise an error if no components match, e.g. if one specifies --component=invalid.

Issues Resolved

• Closes Add platform selection into components #811.
• Closes Build/sign and other run_ workflows skipping components should fail if the component doesn't exist #657

Check List

• Commits are signed per the DCO using --signoff

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[peternied]

Wish there was an easy way to hide the refactoring as you went as a separate PR. Is there another styling tool you'd prefer we pick up?

(Note; I am happy with the refactoring's that I do see and would prefer this updated format)

[gaiksaya]

Should we be changing manifest schema version of all manifests that consist of this change?

[dblock]

Old manifests comply with this schema, but we would increment the version if there was older code reading newer manifests. Since this repo is the only place where we currently read these manifests, we don't have to.