[benchmark] Finish Naming Convention Support

[palimondo]

These are few commits extracted from #20552, which has been stuck in limbo for a while, to fix the LogParser support for the new Benchmark Naming Convention from #20334 and use the 40 character limit to better align columns in Benchmark_Driver's console output (in -output-dir mode).

[palimondo]

@swift-ci please smoke test

[palimondo]

@eeckstein please review 🙏

[palimondo]

@swift-ci please benchmark

[palimondo]

@swift-ci please smoke test os x platform

[swift-ci]

Performance: -O

TEST	OLD	NEW	DELTA	RATIO
Regression
DataAppendDataLargeToLarge	36600	51200	+39.9%	0.71x (?)

Performance: -Osize

TEST	OLD	NEW	DELTA	RATIO
Improvement
DictionaryBridgeToObjC_Access	1048	953	-9.1%	1.10x (?)

How to read the data

The tables contain differences in performance which are larger than 8% and differences in code size which are larger than 1%.

If you see any unexpected regressions, you should consider fixing the
regressions before you merge the PR.

Noise: Sometimes the performance results (not code size!) contain false
alarms. Unexpected regressions which are marked with '(?)' are probably noise.
If you see regressions which you cannot explain you can try to run the
benchmarks again. If regressions still show up, please consult with the
performance team (@eeckstein).

Hardware Overview

  Model Name: Mac Pro
  Model Identifier: MacPro6,1
  Processor Name: 12-Core Intel Xeon E5
  Processor Speed: 2.7 GHz
  Number of Processors: 1
  Total Number of Cores: 12
  L2 Cache (per Core): 256 KB
  L3 Cache: 30 MB
  Memory: 64 GB