ci: deduplicate and cleanup actions

[vaind]

Ubuntu-latest will soon change to ubuntu-24.04 so I was checking out what needs to be changes and noticed we have some duplicate code on flutter packages. This merges the code, similar to what we do for dart packages.

changes:

• add a shared flutter build action and use it
• synchronize matrix configs among flutter packages
• enable flutter-beta channel on windows
• removes flutter upgrade - there's really no reason to do this in CI after we've just installed latest version
• splits wasm && js builds to separate matrix items
• removes android/ios targets in packages that actually don't test it (they just ran flutter test for the current platform)
• remove flutter_integration_test.yml - duplicate of flutter_test.yml
• update conditional path triggers for workflows to include local reusable actions & workflows
• add missing dart 3.5 build

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.08%. Comparing base (1192c0a) to head (3e262c6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2534   +/-   ##
=======================================
  Coverage   87.08%   87.08%           
=======================================
  Files         265      265           
  Lines        9413     9413           
=======================================
  Hits         8197     8197           
  Misses       1216     1216           

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[buenaflor]

nice thx 👍

[github-actions]

iOS Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1261.12 ms	1277.51 ms	16.39 ms
Size	8.42 MiB	9.86 MiB	1.44 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
69670c9	1269.18 ms	1288.69 ms	19.51 ms
98d9a4a	1244.73 ms	1266.33 ms	21.59 ms
6ec7b50	1239.61 ms	1268.93 ms	29.32 ms
2a0edba	1229.27 ms	1259.54 ms	30.27 ms
07cd9e8	1237.04 ms	1257.50 ms	20.46 ms
5baa201	1250.63 ms	1270.04 ms	19.41 ms
2d4fd8b	1207.98 ms	1232.94 ms	24.96 ms
2e93bab	1237.08 ms	1258.41 ms	21.33 ms
0a23f98	1252.98 ms	1276.76 ms	23.78 ms
1cdcacf	1208.35 ms	1235.13 ms	26.77 ms

App size

Revision	Plain	With Sentry	Diff
69670c9	8.10 MiB	9.08 MiB	1004.49 KiB
98d9a4a	8.33 MiB	9.62 MiB	1.29 MiB
6ec7b50	8.38 MiB	9.75 MiB	1.37 MiB
2a0edba	8.32 MiB	9.52 MiB	1.20 MiB
07cd9e8	8.38 MiB	9.77 MiB	1.40 MiB
5baa201	8.33 MiB	9.54 MiB	1.22 MiB
2d4fd8b	8.28 MiB	9.34 MiB	1.06 MiB
2e93bab	8.38 MiB	9.73 MiB	1.36 MiB
0a23f98	8.10 MiB	9.18 MiB	1.08 MiB
1cdcacf	8.32 MiB	9.39 MiB	1.06 MiB

[github-actions]

Android Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	449.54 ms	506.29 ms	56.75 ms
Size	6.46 MiB	7.48 MiB	1.01 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
cd16818	316.57 ms	375.19 ms	58.62 ms
5cc82a0	400.35 ms	474.52 ms	74.17 ms
4829ad3	381.55 ms	455.45 ms	73.90 ms
dd76eef	461.37 ms	540.55 ms	79.18 ms
752e1cb	472.85 ms	511.60 ms	38.76 ms
6078ddc	385.72 ms	463.61 ms	77.89 ms
9811573	309.76 ms	402.60 ms	92.84 ms
ffae3e3	360.67 ms	466.24 ms	105.57 ms
0ceb89c	304.57 ms	357.18 ms	52.61 ms
c9d3212	301.34 ms	361.58 ms	60.24 ms

App size

Revision	Plain	With Sentry	Diff
cd16818	6.26 MiB	7.20 MiB	956.08 KiB
5cc82a0	6.34 MiB	7.28 MiB	966.66 KiB
4829ad3	6.33 MiB	7.26 MiB	943.11 KiB
dd76eef	6.35 MiB	7.40 MiB	1.05 MiB
752e1cb	6.49 MiB	7.57 MiB	1.08 MiB
6078ddc	6.34 MiB	7.29 MiB	967.80 KiB
9811573	5.94 MiB	6.96 MiB	1.02 MiB
ffae3e3	6.26 MiB	7.20 MiB	958.78 KiB
0ceb89c	5.94 MiB	6.95 MiB	1.01 MiB
c9d3212	6.16 MiB	7.14 MiB	1010.90 KiB