chore: Update workflow to fetch labels using github API

[itaybre]

Looks like GH actions events may be missing the PR labels.

This PR fetch them manually instead of depending on the obtained data

Closes #6722

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.125%. Comparing base (3a3d93b) to head (313832c).
⚠️ Report is 19 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #6721       +/-   ##
=============================================
- Coverage   85.163%   85.125%   -0.038%     
=============================================
  Files          453       453               
  Lines        27689     27706       +17     
  Branches     12111     12143       +32     
=============================================
+ Hits         23581     23585        +4     
- Misses        4063      4076       +13     
  Partials        45        45               

see 64 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1224.21 ms	1254.89 ms	30.68 ms
Size	24.15 KiB	1.01 MiB	1015.23 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
2481950	1221.04 ms	1248.98 ms	27.94 ms
9766cb1	1233.54 ms	1267.65 ms	34.10 ms
7eafbde	1212.16 ms	1243.64 ms	31.48 ms
01faa71	1238.81 ms	1263.98 ms	25.17 ms
d0f70ce	1226.54 ms	1247.04 ms	20.50 ms
7f2f69c	1237.61 ms	1266.96 ms	29.35 ms
fc0757d	1231.83 ms	1248.98 ms	17.15 ms
5cbd333	1220.78 ms	1234.15 ms	13.36 ms
e0e5391	1191.21 ms	1243.14 ms	51.93 ms
f92cfa9	1228.45 ms	1251.33 ms	22.88 ms

App size

Revision	Plain	With Sentry	Diff
2481950	23.74 KiB	872.74 KiB	849.00 KiB
9766cb1	23.75 KiB	1023.78 KiB	1000.03 KiB
7eafbde	23.75 KiB	927.53 KiB	903.78 KiB
01faa71	23.75 KiB	926.77 KiB	903.02 KiB
d0f70ce	23.75 KiB	913.09 KiB	889.34 KiB
7f2f69c	23.75 KiB	913.38 KiB	889.63 KiB
fc0757d	23.75 KiB	850.73 KiB	826.98 KiB
5cbd333	23.74 KiB	969.66 KiB	945.92 KiB
e0e5391	23.74 KiB	1022.21 KiB	998.46 KiB
f92cfa9	23.75 KiB	855.38 KiB	831.62 KiB

Previous results on branch: itay/fetch_pr_labels

Startup times

Revision	Plain	With Sentry	Diff
46e2bea	1192.58 ms	1219.68 ms	27.10 ms

App size

Revision	Plain	With Sentry	Diff
46e2bea	23.75 KiB	1.00 MiB	1001.52 KiB

[philprime]

LGTM