[DO NOT MERGE] Add backwards compatibility test for real amplitude circuits

[gadial]

Summary

This PR adds new test to the QPY backwards compatibility suite based on RealAmplitude circuits, as the 2.4 release candidates encountered errors with such circuits generated by old qiskit implementations which were not locally reproducible.

Details and comments

[qiskit-bot]

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

• @Qiskit/terra-core
• @mtreinish

[coveralls]

Pull Request Test Coverage Report for Build 23708733996

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

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 13 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.001%) to 87.464%

---

Files with Coverage Reduction	New Missed Lines	%
crates/circuit/src/parameter/symbol_expr.rs	2	73.85%
crates/qasm2/src/lex.rs	5	92.8%
crates/qasm2/src/parse.rs	6	97.63%

Totals
Change from base Build 23707500226:	0.001%
Covered Lines:	104017
Relevant Lines:	118926

---

💛 - Coveralls

[gadial]

Done in #15900