CI: Update versions and rely on go.mod

[dveeden]

What problem does this PR solve?

What is changed and how it works?

• Use the Go version that is set in go.mod instead of specifying a different version in CI
• Update various actions

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Details

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[dveeden]

/cc @xhebox

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.34%. Comparing base (f6b4dc8) to head (779359b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2690      +/-   ##
==========================================
+ Coverage   38.35%   42.34%   +3.99%     
==========================================
  Files         424      424              
  Lines       47043    47043              
==========================================
+ Hits        18042    19920    +1878     
+ Misses      26595    24434    -2161     
- Partials     2406     2689     +283     

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