fix: delete all stored Parse data and cache when deleteKeychainIfNeeded is true

[cbaker6]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Make sure cache is deleted during first start of app when deleteKeychainIfNeeded = true

Related issue: #n/a

Approach

Delete the cache on first restart when deleteKeychainIfNeeded = true

TODOs before merging

• Add tests
• Bump Linux CI to Swift 5.5.1
• Add entry to changelog

[parse-github-assistant]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov]

Codecov Report

Merging #280 (db439f8) into main (a51a8de) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #280      +/-   ##
==========================================
+ Coverage   82.23%   82.25%   +0.01%     
==========================================
  Files         104      104              
  Lines       10574    10574              
==========================================
+ Hits         8696     8698       +2     
+ Misses       1878     1876       -2     

Impacted Files	Coverage Δ
Sources/ParseSwift/Parse.swift	98.72% <100.00%> (ø)
Sources/ParseSwift/Protocols/Queryable.swift	0.00% <0.00%> (-16.67%)	⬇️
Sources/ParseSwift/LiveQuery/ParseLiveQuery.swift	73.82% <0.00%> (+0.73%)	⬆️

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