Provision delivery format in contract

[Cali0707]

Fixes #3970

Proposed Changes

• Add the format field to the egress config

[codecov]

Codecov Report

Attention: Patch coverage is 5.12821% with 37 lines in your changes missing coverage. Please review.

Project coverage is 48.27%. Comparing base (dcb704a) to head (d4d2007).
Report is 1 commits behind head on main.

Files	Patch %	Lines
control-plane/pkg/contract/contract.pb.go	3.12%	31 Missing ⚠️
control-plane/pkg/core/config/utils.go	14.28%	5 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3987      +/-   ##
==========================================
- Coverage   48.33%   48.27%   -0.07%     
==========================================
  Files         244      244              
  Lines       14579    14600      +21     
==========================================
+ Hits         7047     7048       +1     
- Misses       6821     6840      +19     
- Partials      711      712       +1     

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[matzew]

/test upgrade-tests

[Cali0707]

@matzew I've rebased this to only have the relevant changes, can you recheck?

[matzew]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, matzew

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[matzew]

/retest-required

[matzew]

/retest

[Cali0707]

/retest-required

[Cali0707]

/retest-required

[Cali0707]

/test upgrade-tests

[knative-prow]

New changes are detected. LGTM label has been removed.

[Cali0707]

/cc @matzew

While going through the data plane changes I realized I needed to essentially re-do the changes in this PR so since the data plane changes are isolated I added them here as well instead

I'll add unit tests and an e2e test later, would you mind taking a look at the data plane code and letting me know if the approach I'm taking makes sense?

[Cali0707]

/cc @pierDipi

[pierDipi]

/retest

[Cali0707]

/retest-required

[knative-prow]

@Cali0707: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
upgrade-tests_eventing-kafka-broker_main	9904915	link	true	/test upgrade-tests

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[knative-prow-robot]

PR needs rebase.

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