Implement RGate in Rust

[jlapeyre]

This completes all tasks of implementing RGate in Rust rather than Python.

This replaces

• 12507

12507 has been modified and split into the present PR and #12651

[qiskit-bot]

One or more of the following people are relevant to this code:

• @Cryoris
• @Qiskit/terra-core
• @ajavadia
• @kevinhartman
• @mtreinish

[coveralls]

Pull Request Test Coverage Report for Build 9673800273

Details

• 17 of 47 (36.17%) changed or added relevant lines in 4 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.007%) to 89.713%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/circuit/src/operations.rs	3	33	9.09%
<!--	Total:	17	47	36.17%	-->

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	2	92.37%
<!--	Total:	2		-->

Totals
Change from base Build 9661630219:	-0.007%
Covered Lines:	63783
Relevant Lines:	71097

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9681898421

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 17 of 47 (36.17%) changed or added relevant lines in 4 files are covered.
• 17 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.004%) to 89.724%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/circuit/src/operations.rs	3	33	9.09%
<!--	Total:	17	47	36.17%	-->

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	3	92.37%
qiskit/synthesis/discrete_basis/solovay_kitaev.py	4	94.74%
qiskit/providers/fake_provider/generic_backend_v2.py	10	94.71%
<!--	Total:	17		-->

Totals
Change from base Build 9661630219:	0.004%
Covered Lines:	63798
Relevant Lines:	71105

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9688190770

Details

• 38 of 49 (77.55%) changed or added relevant lines in 4 files are covered.
• 27 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.04%) to 89.746%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/circuit/src/operations.rs	24	35	68.57%
<!--	Total:	38	49	77.55%	-->

Files with Coverage Reduction	New Missed Lines	%
qiskit/transpiler/passes/synthesis/unitary_synthesis.py	2	88.2%
crates/qasm2/src/lex.rs	7	92.11%
crates/qasm2/src/parse.rs	18	96.69%
<!--	Total:	27		-->

Totals
Change from base Build 9683280067:	-0.04%
Covered Lines:	63828
Relevant Lines:	71121

---

💛 - Coveralls