Apply activation quantization parameters selection(3rd PR internal review)

[gouda-youichi]

Pull Request Description:

Apply activation quantization parameters selection Stage3-4

• Simplification of tests.
• revert about the assert.

cf:
SonySemiconductorSolutions#1487
#15
SonySemiconductorSolutions#1466

Checklist before requesting a review:

• I set the appropriate labels on the pull request.
• I have added/updated the release note draft (if necessary).
• I have updated the documentation to reflect my changes (if necessary).
• All function and files are well documented.
• All function and classes have type hints.
• There is a licenses in all file.
• The function and variable names are informative.
• I have checked for code duplications.
• I have added new unittest (if necessary).