This commit adds validation of any buildpacks that are specified for
image building to match them against buildpacks that are bundled in
the builder. If an image buildpack's ID, version, and one layer
hash match the same information stored in a label on the builder
image, that buildpack won't be added and the buildpack bundled in
the builder will be used instead. This reduces the chance of adding to
the total count of layers in a builder image unnecessarily.
Fixes gh-31233
17bdc526f6