feat/autogenerate-proto-imports

[roivaz]

Context: There is a list of imports in pkg/envoy/serializer/v3/serializer.go that is required so the serialization/deserialization code is able to handle proto messages of the Any type. This is a dynamic list of imports as the files containing protobuffer definitions in go-control-plane can change from version to version. So far this list of imports was manually maintained, which is problematic as the list could end up being out of date.

This PR automates the process of generating the list of imports:

• The list is now maintained in a separate package pkg/envoy/protos/v3 that can be imported from other packages.
• A generator has been written that performs the following tasks:
  • Inspects the project's go.mod to determine the go-control-plane release in use.
  • Clones the specific tag of the go-control-plane repository into memory and looks for the .pb.go files that belong to the v3 api version (though the generator is already able to look for other api versions).
  • Generates the file with all the imports within the pkg/envoy/protos/v3 package.
• go generate is used to trigger the execution of the code generator from the Makefile when the binary is built.

Currently the list of imports is out of date in marin3r-v0.9.0 so a new patch release will be required after this PR as some proto message definitions are missing, resulting in an error if a user tries to use them.

/kind feature
/kind bug
/priority important-soon
/assign

[slopezz]

/lgtm

[3scale-robot]

LGTM label has been added.

Git tree hash: cd463602ebf07342dbfa1334dc2db0cd7f280a8c

[3scale-robot]

LGTM label has been added.

Git tree hash: 04ca43bf538e137b629c1333b4ff369697fa6426

[3scale-robot]

LGTM label has been added.

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[roivaz]

/ok-to-test

[3scale-robot]

New changes are detected. LGTM label has been removed.

[roivaz]

/remove-label ok-to-test

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[roivaz]

/ok-to-test

[roivaz]

/approve

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