Make api as a separate module

[jiangpengcheng]

(If this PR fixes a github issue, please add Fixes #<xyz>.)

Fixes #745

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[jiangpengcheng]

this version(v1.14.0) will cause an error while run make redhat-certificated-bundle

Generating kustomize files in config/manifests
-: pattern /home/runner/work/function-mesh/function-mesh/api/...: main module (github.com/streamnative/function-mesh) does not contain package github.com/streamnative/function-mesh/api/compute/v1alpha1
FATA[0000] Error generating kustomize files: error getting ClusterServiceVersion base: error generating ClusterServiceVersion definitions metadata: one or more API packages had type errors

[freeznet]

any error from make bundle?

[jiangpengcheng]

it has same error if use v1.14.0, all caused by command:

operator-sdk generate kustomize manifests -q

[freeznet]

I cannot reproduce it, could you please delete the bundle directory and try again to see if any error occurs?

[jiangpengcheng]

yes, it's same error, did you run the command with this PR or on master branch?

[illegalnumbers]

I'm also confused as to why the RELEASE_VERSION of the operator has to get updated with this but the code change itself seems fine. cc @freeznet if you have a different opinion please mark a review here requesting changes.

[jiangpengcheng]

I'm also confused as to why the RELEASE_VERSION of the operator has to get updated with this but the code change itself seems fine. cc @freeznet if you have a different opinion please mark a review here requesting changes.

the RELEASE_VERSION is not mean the "release version" for the function-mesh-operator, but the "release version" of the operator-sdk