Switch from qiskit-terra to qiskit

[woodsp-ibm]

Summary

Similar to qiskit-community/qiskit-machine-learning#680

Switches over to qiskit from qiskit-terra

• requirements.txt updated
• CI updated for install main dependencies
• CONTRIBUTING.MD links etc updated. Plus I removed/simplified some bits which are no longer correct and may have led to confusion down the line.

There was no Neko integration/workflow here to be removed (unlike ML)

Details and comments

[coveralls]

Pull Request Test Coverage Report for Build 6041997690

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 75.822%

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Totals
Change from base Build 6025003020:	0.0%
Covered Lines:	646
Relevant Lines:	852

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💛 - Coveralls