Rename bindgen-c to bindgen-cli

[jakelishman]

This name is rather clearer, and makes more sense as we expand the capabilities the tool can drive.

Built on #15778, and that PR (now I come back to it) is the initial motivation for the rename.

AI/LLM disclosure

• I didn't use LLM tooling, or only used it privately.
• I used the following tool to help write this PR description:
• I used the following tool to generate or modify code:

[qiskit-bot]

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

• @Qiskit/terra-core

[coveralls]

Coverage Report for CI Build 25100513212

Coverage increased (+0.01%) to 87.504%

Details

• Coverage increased (+0.01%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 3 coverage regressions across 2 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

3 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
crates/qasm2/src/lex.rs	2	92.8%
crates/circuit/src/parameter/parameter_expression.rs	1	90.53%

---

Coverage Stats

Relevant Lines:	120034
Covered Lines:	105034
Line Coverage:	87.5%
Coverage Strength:	977310.14 hits per line

---

💛 - Coveralls

[qiskit-bot]

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

• @Qiskit/terra-core