CICD: upgrade xcode on circleci macos executors

[algolucky]

Summary

• upgrades xcode to 13.4.1 since CircleCI is planning to deprecate the version we are using

• removes s from sleep commands in testInfraTest.exp expect tests b/c newer versions of macos do not allow that syntax anymore

• CircleCI Forum Discussion on Xcode Deprecation

Test Plan

• see circleci tests

[codecov]

Codecov Report

Merging #4188 (3d386a1) into master (688b3d7) will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4188      +/-   ##
==========================================
- Coverage   54.56%   54.52%   -0.05%     
==========================================
  Files         391      391              
  Lines       48734    48734              
==========================================
- Hits        26593    26572      -21     
- Misses      19919    19933      +14     
- Partials     2222     2229       +7     

Impacted Files	Coverage Δ
network/wsPeer.go	65.47% <0.00%> (-4.94%)	⬇️
util/metrics/reporter.go	56.31% <0.00%> (-4.86%)	⬇️
cmd/algoh/blockWatcher.go	77.77% <0.00%> (-3.18%)	⬇️
crypto/merkletrie/trie.go	66.42% <0.00%> (-2.19%)	⬇️
crypto/merkletrie/node.go	91.62% <0.00%> (-1.87%)	⬇️
catchup/peerSelector.go	98.95% <0.00%> (-1.05%)	⬇️
catchup/service.go	68.88% <0.00%> (-0.75%)	⬇️
network/wsNetwork.go	64.70% <0.00%> (-0.20%)	⬇️
data/transactions/verify/txn.go	44.88% <0.00%> (+0.88%)	⬆️
data/abi/abi_type.go	88.62% <0.00%> (+0.94%)	⬆️
... and 3 more

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[algobarb]

Awesome! Thanks for troubleshooting the sleep error.