Reduce amount of project factory creations in ErrorTracking API specs

What does this MR do and why?

This MR reduces the amount of factory creations (project) and also:

• Fix some RuboCop offenses for RSpec/ContextWording
• Remove specs for Reporter access since we are testing Developer already
• Run specs in random order

RSpec Profiling

Here's the output from test-prof when run with FPROF=1. Note:

• Total amount of factories created went down from 116 to 34 🚀
• Total events went down from 5046 to 2074
• Queries saved: 2972

Before

Finished in 27.56 seconds (files took 12.02 seconds to load)
30 examples, 0 failures

Randomized with seed 6059

[TEST PROF INFO] Time spent in factories: 00:09.592 (32.01% of total time)
[TEST PROF INFO] Factories usage

 Total: 116
 Total top-level: 59
 Total time: 00:09.592 (out of 00:37.725)
 Total uniq factories: 6

   total   top-level     total time      time per call      top-level time               name

      30           3        7.8077s            0.2603s             0.6139s            project
      30           0        2.6931s            0.0898s             0.0000s          namespace
      27          27        8.2645s            0.3061s             8.2645s project_error_tracking_setting
      27          27        0.2980s            0.0110s             0.2980s personal_access_token
       1           1        0.4079s            0.4079s             0.4079s               user
       1           1        0.0085s            0.0085s             0.0085s            license

After

Finished in 16.95 seconds (files took 10.28 seconds to load)
27 examples, 0 failures

Randomized with seed 1702

[TEST PROF INFO] Time spent in factories: 00:01.659 (8.7% of total time)
[TEST PROF INFO] Factories usage

 Total: 34
 Total top-level: 30
 Total time: 00:01.659 (out of 00:24.959)
 Total uniq factories: 6

   total   top-level     total time      time per call      top-level time               name

      24          24        0.3211s            0.0134s             0.3211s personal_access_token
       3           2        0.9110s            0.3037s             0.6815s            project
       3           0        0.2031s            0.0677s             0.0000s          namespace
       2           2        0.3040s            0.1520s             0.3040s project_error_tracking_setting
       1           1        0.3445s            0.3445s             0.3445s               user
       1           1        0.0079s            0.0079s             0.0079s            license

How to set up and validate locally

bin/rspec spec/requests/api/error_tracking/project_settings_spec.rb

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #393904 (closed)