Add upgrade test script placeholder

[pierDipi]

To unblock other PRs, I'm adding a script that will make the upgrade
test job green.

Proposed Changes

• Add upgrade test script placeholder

Release Note

None

Docs

None

[pierDipi]

/cc @aliok @matzew @devguyio

[codecov]

Codecov Report

Merging #1529 (db61b08) into main (dd93416) will decrease coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #1529      +/-   ##
============================================
- Coverage     73.69%   73.64%   -0.05%     
+ Complexity      588      586       -2     
============================================
  Files           107      107              
  Lines          4128     4128              
  Branches        165      165              
============================================
- Hits           3042     3040       -2     
- Misses          844      847       +3     
+ Partials        242      241       -1     

Flag	Coverage Δ
java-unittests	82.00% <ø> (-0.11%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...dispatcher/impl/consumer/BaseConsumerVerticle.java	87.50% <0.00%> (-6.25%)	⬇️

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[pierDipi]

    operation.go:123: Failed while waiting for 1 endpoints in service trans-pod: did not reach the desired number of endpoints, got: 0: endpoints "trans-pod" not found

/retest

[aliok]

/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aliok, pierDipi

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• OWNERS [aliok,pierDipi]

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[pierDipi]

/cherry-pick release-0.26

[knative-prow-robot]

@pierDipi: new pull request created: #1553

In response to this:

/cherry-pick release-0.26

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[pierDipi]

/cherry-pick release-1.0

[knative-prow-robot]

@pierDipi: #1529 failed to apply on top of branch "release-1.0":

Applying: Add upgrade test script placeholder
.git/rebase-apply/patch:13: new blank line at EOF.
+
warning: 1 line adds whitespace errors.
Using index info to reconstruct a base tree...
Falling back to patching base and 3-way merge...
CONFLICT (add/add): Merge conflict in test/e2e-upgrade-tests.sh
Auto-merging test/e2e-upgrade-tests.sh
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Add upgrade test script placeholder
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.0

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.