fix: SpanProtocol add setData for Swift

[philipphofmann]

📜 Description

Swift didn't have a method for SpanProtocol.setData as the Swift name for
setData was setExtra by mistake. This is fixed now by adding an setExtra
for both Objective-C and Swift to avoid a breaking change. setExtra will
be deprecated and removed in future versions.

💡 Motivation and Context

I came across this issue when looking at the code.

💚 How did you test it?

Unit tests.

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• Review from the native team if needed
• No breaking changes

🔮 Next steps

[codecov-commenter]

Codecov Report

Merging #1305 (c9b238c) into master (524a77d) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1305      +/-   ##
==========================================
+ Coverage   95.47%   95.51%   +0.04%     
==========================================
  Files         149      149              
  Lines        5326     5330       +4     
==========================================
+ Hits         5085     5091       +6     
+ Misses        241      239       -2     

Impacted Files	Coverage Δ
Sources/Sentry/SentrySpan.m	100.00% <100.00%> (ø)
Sources/Sentry/SentryTracer.m	98.53% <100.00%> (+0.50%)	⬆️
Sources/Sentry/SentryNetworkTracker.m	99.18% <0.00%> (+0.81%)	⬆️

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