test improvements remove deprecates avoid nils, bump go version 1.20.x

[jrangelramos]

Changes

• 🧹 removing deprecated method calls on test
• 🧹 avoiding nils on http calls for test
• 🧹 improving match condition for func run test

/kind cleanup

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (788f18c) 56.33% compared to head (bbf1a78) 62.57%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2032      +/-   ##
==========================================
+ Coverage   56.33%   62.57%   +6.24%     
==========================================
  Files         105      106       +1     
  Lines       13691    13693       +2     
==========================================
+ Hits         7713     8569     +856     
+ Misses       5197     4248     -949     
- Partials      781      876      +95     

Flag	Coverage Δ
e2e-test	36.46% <ø> (ø)
e2e-test-oncluster-runtime	26.79% <ø> (?)
e2e-test-runtime-go	25.59% <ø> (?)
e2e-test-runtime-node	26.60% <ø> (?)
e2e-test-runtime-python	26.60% <ø> (?)
e2e-test-runtime-quarkus	26.71% <ø> (?)
e2e-test-runtime-rust	25.59% <ø> (?)
e2e-test-runtime-springboot	25.64% <ø> (?)
e2e-test-runtime-typescript	26.71% <ø> (?)
integration-tests	51.47% <ø> (?)
unit-tests-macos-latest	48.21% <ø> (?)
unit-tests-ubuntu-latest	49.00% <ø> (?)

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see 23 files with indirect coverage changes

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[matejvasek]

/approve
/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jrangelramos, matejvasek

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