Revert Pulse model (#11215, #10694)

[TsafrirA]

Summary

With the development of the new pulse compiler, model and IR moving to a feature branch, this PR reverts PRs #11215 and #10694. The content will be moved to the feature branch.

Details and comments

Corrections to the Qubit references were not reverted.

[coveralls]

Pull Request Test Coverage Report for Build 7046707898

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 17 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.02%) to 87.414%

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Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	5	92.17%
crates/qasm2/src/parse.rs	12	97.13%

Totals
Change from base Build 7039950767:	-0.02%
Covered Lines:	59624
Relevant Lines:	68209

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💛 - Coveralls

[nkanazawa1989]

Thanks @TsafrirA . Keeping the change of inter sphinx reference (.Qubit -> circuit.Qubit) looks reasonable.

Note that the feature branch still stays in Qiskit/qiskit (https://github.com/Qiskit/qiskit/tree/feature/pulse-ir); just a reference for people who may be interested in tracking this development. All related PRs will continue to appear in this repository which give us transparency of development, although this might create some noise in CI. The feature branch in Qiskit is not fully functional unless #11327 is merged and cherry-picked to feature/pulse-ir.

Merging this PR doesn't mean we give up implementation of #10759. The reverted pulse submodule (model) doesn't work at all until we introduce new pulse compiler, and the model module must be reverted not to introduce WIP objects in 1.0 prerelease. We plan to complete development with the feature branch, and new feature will be available with Qiskit 2.0 release. As far as I know this pattern is the first attempt in Qiskit, and protocol may change in future if we find this pattern doesn't fit in with the Qiskit standard.