release bundle attribute in version property

[grokspawn]

Description of the change:
Adds a new bundle-scoped "release" flag to the existing version property to allow for more sophisticated replacement strategies with improved transparency.
Adds a new substitutesFor catalog template to help folks trivially adopt the new approaches and avoid common error scenarios.

Motivation for the change:
As brief and RFC state, the imperative upgrade graph building process had a CSV attribute "substitutesFor" which allowed tooling to perform bundle-level replacement in resulting graphs. We had no equivalent FBC approach to the problem where there is a packaging-only change which we need to insert into an existing graph in a way that it didn't pretend to be the original bundle, but made it possible to prefer the new bundle over the old one, and even upgrade from the old to the new.

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign camilamacedo86 for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

❌ Patch coverage is 82.89474% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.63%. Comparing base (24737fb) to head (31ef961).

Files with missing lines	Patch %	Lines
alpha/template/substitutes/substitutes.go	85.29%	10 Missing and 5 partials ⚠️
alpha/model/model.go	78.94%	8 Missing ⚠️
alpha/declcfg/declcfg_to_model.go	70.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1792      +/-   ##
==========================================
+ Coverage   55.37%   55.63%   +0.26%     
==========================================
  Files         136      137       +1     
  Lines       16003    16148     +145     
==========================================
+ Hits         8861     8984     +123     
- Misses       5987     6002      +15     
- Partials     1155     1162       +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[grokspawn]

Please note that this repo's merge method is set to squash, so all of these commits will get squished to a single one even if I forget to do it manually.

They're preserved here mostly because there has been a lot of ground covered over the lifetime of this feature w.r.t. different implementation strategies, and I didn't want to lose that.