chore: add release_stage property to definitions

[jvallesm]

Because

• With feat: support unimplemented release stages in component definitions pipeline-backend#414 the release_stage property will be displayed and filtered by in the component definition lists.

This commit

• Adds the release property for the existing operators

Next steps ⏭️

• This field, along with others, will be documented so it is clear how to set it in new contributions.
• In the console connector and operator lists, unimplemented components will be hidden.

[linear]

INS-3737 Implement coming soon / open for contributions in definitions.json

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.84%. Comparing base (043d5e3) to head (761c554).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #68   +/-   ##
=======================================
  Coverage   70.84%   70.84%           
=======================================
  Files           7        7           
  Lines         758      758           
=======================================
  Hits          537      537           
  Misses        175      175           
  Partials       46       46           

Flag	Coverage Δ
unittests	70.84% <ø> (ø)

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[jvallesm]

QA

curl --request GET \
  --url "localhost:8080/vdp/v1beta/component-definitions?filter=release_stage=RELEASE_STAGE_ALPHA" \
  --header 'accept: application/json' | jq -c '.component_definitions[] | if .type == "COMPONENT_TYPE_OPERATOR" then .operator_definition  else .connector_definition end | {title,release_stage}'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 10285    0 10285    0     0   223k      0 --:--:-- --:--:-- --:--:--  228k
{"title":"Instill Model","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"OpenAI","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"Numbers Protocol","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"Pinecone","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"JSON","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"Redis","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"Airbyte Destination","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"BigQuery","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"Google Cloud Storage","release_stage":"RELEASE_STAGE_ALPHA"}
{"title":"Google Search","release_stage":"RELEASE_STAGE_ALPHA"}