feat: add performance tests to benchmark Robocop on release

[bhirsz]

Draft PR for testing.

Closes #1596

For now instead of commit file the repository - which makes the result often stale and it's highly environment dependant - we run tests for the past 5 versions. The results are published in the release PR.

[bhirsz]

There are some bugs to be fixed but summary is now available in job summary. Hopefully I will move it into the PR itself:

[github-actions]

Performance Report

Version	Project traversal	Linting (print+cache)	Linting (print+no cache)	Linting (no print+cache)	Linting (no print+no cache)	Linting (large file with print)	Formatting
7.2.0	0.268s (-29.19%)	1.701s (-26.29%)	3.458s (1.59%)	0.404s (-52.8%)	2.064s (6.04%)	4.942s (58.4%)	0.513s (22.46%)
7.1.0	0.379s (-33.38%)	2.307s (9.49%)	3.404s (0.0%)	0.856s (-3.39%)	1.946s (-50.68%)	3.120s (-24.27%)	0.419s (0.0%)
7.0.0	0.569s (76.17%)	2.107s	3.404s	0.886s	3.946s	4.120s	0.419s (50.03%)
6.12.0	0.323s (3.55%)	-	-	-	-	-	0.279s
6.11.0	0.312s (-93.89%)	-	-	-	-	-	-
6.9.0	5.110s	-	-	-	-	-	-

[github-actions]

Performance Report

Version	Project traversal	Linting (print+cache)	Linting (print+no cache)	Linting (no print+cache)	Linting (no print+no cache)	Linting (large file with print)	Formatting
7.2.0	0.269s (-94.74%)	1.629s	3.263s	0.388s	1.986s	4.808s	0.501s
6.9.0	5.110s	-	-	-	-	-	-

[github-actions]

Performance Report

Version	Project traversal	Linting (print+cache)	Linting (print+no cache)	Linting (no print+cache)	Linting (no print+no cache)	Linting (large file with print)	Formatting
7.2.0	0.373s (-92.7%)	2.763s	4.551s	0.556s	2.768s	6.872s	0.727s
6.9.0	5.110s	-	-	-	-	-	-

[github-actions]

Performance Report

Version	Project traversal	Linting (print+cache)	Linting (print+no cache)	Linting (no print+cache)	Linting (no print+no cache)	Linting (large file with print)	Formatting
7.2.0	0.372s (0.46%)	2.694s (-41.05%)	4.485s (-29.8%)	0.547s (-3.41%)	2.746s (-3.83%)	6.831s (-3.67%)	0.502s (-0.78%)
7.1.0	0.371s (-2.27%)	4.569s	6.389s (22.61%)	0.566s	2.855s (16.12%)	7.092s (3.65%)	0.506s (-0.06%)
7.0.0	0.379s (1.56%)	-	5.211s (0.61%)	-	2.459s (2.99%)	6.842s (1.46%)	0.507s (0.59%)
6.13.0	0.373s (-92.69%)	-	5.180s	-	2.387s	6.744s	0.504s
6.9.0	5.110s	-	-	-	-	-	-