[WIP] use token input instead of env for codecov

[nojnhuh]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:

I have a hypothesis that the recent changes to codecov to use tokens defined in forks to get around the rate limits associated with tokenless uploads requires the token input to be set instead of the CODECOV_TOKEN environment variable.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

• cherry-pick candidate

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

NONE

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.19%. Comparing base (287fa1f) to head (2172f0b).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4934      +/-   ##
==========================================
+ Coverage   62.18%   62.19%   +0.01%     
==========================================
  Files         201      201              
  Lines       16878    16878              
==========================================
+ Hits        10495    10497       +2     
+ Misses       5593     5591       -2     
  Partials      790      790              

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

[mboersma]

Seems like #4935 needs this fix.

[nojnhuh]

I'm not sure yet that this actually fixes anything, given this message is what I was hoping to avoid:
https://github.com/kubernetes-sigs/cluster-api-provider-azure/actions/runs/9617996856/job/26543508140?pr=4934#step:7:8

==> Fork detected, tokenless uploading used

I think I might try bumping the codecov action version here and see if that at least gets the job to succeed at all.

[nojnhuh]

I'm thinking my hypothesis is wrong here so I don't think this actually makes any meaningful difference.

/close

[k8s-ci-robot]

@nojnhuh: Closed this PR.

In response to this:

I'm thinking my hypothesis is wrong here so I don't think this actually makes any meaningful difference.

/close

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