Remove V9 checks for SentrySerializable

[noahsmartin]

In V9 these protocol conformances are made internal

#skip-changelog

Closes #6523

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 7.397%. Comparing base (827b50c) to head (e5319d6).
✅ All tests successful. No failed tests found.

❗ There is a different number of reports uploaded between BASE (827b50c) and HEAD (e5319d6). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (827b50c)	HEAD (e5319d6)
	4	1

Additional details and impacted files

@@              Coverage Diff              @@
##              main    #6522        +/-   ##
=============================================
- Coverage   86.492%   7.397%   -79.095%     
=============================================
  Files          451      416        -35     
  Lines        27488    26265      -1223     
  Branches     11970     9670      -2300     
=============================================
- Hits         23775     1943     -21832     
- Misses        3667    24311     +20644     
+ Partials        46       11        -35     

Files with missing lines	Coverage Δ
...wift/Integrations/SentryGlobalEventProcessor.swift	0.000% <ø> (-84.616%)	⬇️
...ift/Integrations/UserFeedback/SentryFeedback.swift	0.000% <ø> (-74.419%)	⬇️
...es/Swift/Protocol/Codable/SentryEventDecoder.swift	0.000% <ø> (-100.000%)	⬇️
Sources/Swift/Tools/SentryClientReport.swift	0.000% <ø> (-100.000%)	⬇️
Sources/Swift/Tools/SentryDiscardedEvent.swift	0.000% <ø> (-100.000%)	⬇️

... and 430 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1217.57 ms	1247.88 ms	30.31 ms
Size	23.75 KiB	1.00 MiB	1004.60 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
fb611a9	1222.63 ms	1254.79 ms	32.16 ms
3ec47ae	1231.02 ms	1256.67 ms	25.65 ms
7cc23cf	1203.15 ms	1232.11 ms	28.96 ms
2c889f6	1206.35 ms	1233.29 ms	26.94 ms
2be5991	1228.55 ms	1264.65 ms	36.10 ms
354b020	1223.88 ms	1236.82 ms	12.94 ms
9080e6c	1221.17 ms	1247.87 ms	26.71 ms
466e905	1223.78 ms	1256.70 ms	32.92 ms
f8029e2	1245.16 ms	1261.32 ms	16.16 ms
f2bfecd	1234.92 ms	1250.34 ms	15.42 ms

App size

Revision	Plain	With Sentry	Diff
fb611a9	23.74 KiB	1022.38 KiB	998.64 KiB
3ec47ae	23.75 KiB	919.88 KiB	896.13 KiB
7cc23cf	23.75 KiB	913.62 KiB	889.87 KiB
2c889f6	23.75 KiB	1010.42 KiB	986.67 KiB
2be5991	23.75 KiB	994.73 KiB	970.98 KiB
354b020	23.75 KiB	878.19 KiB	854.44 KiB
9080e6c	23.75 KiB	926.80 KiB	903.05 KiB
466e905	23.75 KiB	1010.51 KiB	986.76 KiB
f8029e2	23.75 KiB	893.72 KiB	869.97 KiB
f2bfecd	23.75 KiB	919.68 KiB	895.93 KiB