[FEA] Remove Speedup estimation from PluginTypeChecker

[amahussein]

Is your feature request related to a problem? Please describe.

After the static speedups have been removed. We should cleanup the code to get rid of the operator scores defined for each environment.
The two main classes affected by that change are

• PluginTypeChecker and
• SqlPlanParser
• Qualification

Describe the solution you'd like
This can be done in 2 steps:

1. Remove the operator score files and default the speedup to be 1.5 for all return.
2. Refactor the qualification to eventually get rid of the code that calculates any speedups or GPU durations.