Devops: Use Cloudflare API token instead of auth key

[onetechnical]

Summary

If using Cloudflare, it's preferable to use the CLOUDFLARE_API_TOKEN versus CLOUDFLARE_AUTH_KEY / CLOUDFLARE_EMAIL authentication. This is because you can striate permissions and add further lock downs to credentials.

Test Plan

Verified I could use the Cloudflare library appropriately with CLOUDFLARE_API_TOKEN.

[codecov]

Codecov Report

Merging #4039 (7e76d29) into master (8088e04) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4039      +/-   ##
==========================================
- Coverage   54.39%   54.36%   -0.04%     
==========================================
  Files         391      391              
  Lines       48570    48570              
==========================================
- Hits        26418    26403      -15     
- Misses      19929    19939      +10     
- Partials     2223     2228       +5     

Impacted Files	Coverage Δ
ledger/tracker.go	70.56% <0.00%> (-6.07%)	⬇️
crypto/merkletrie/trie.go	66.42% <0.00%> (-2.19%)	⬇️
crypto/merkletrie/node.go	91.62% <0.00%> (-1.87%)	⬇️
data/abi/abi_type.go	87.67% <0.00%> (-0.95%)	⬇️
network/wsNetwork.go	62.79% <0.00%> (-0.20%)	⬇️
catchup/service.go	68.64% <0.00%> (+0.49%)	⬆️
network/wsPeer.go	68.05% <0.00%> (+2.22%)	⬆️

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[algobarb]

test looked good