feat(ssa): Higher order functions in arrays

[vezenovm]

Description

Problem*

Resolves #5503

I am marking this as resolved even though this snippet will still panic:

fn main() {
    let lambdas: [fn(()) -> (); 0] = [];
    lambdas[0](());
}

However, it now has a new panic from the one in the issue, and I will push a follow-up that removes this new panic.

All the other code in the issue works as expected after this PR.

This PR builds upon #8672

Summary*

1. We were not tracking functions stored within arrays in remove_unreachable. This had to be updated as otherwise by the time we got to defunctionalize the function being called would no longer exist.
2. We had to find functions used as values now only in Call/Store but also MakeArray
3. We had to replace first class functions inside of the make array instruction type and change them to fields.

Additional Context

Documentation*

Check one:

• No documentation needed.
• Documentation included in this PR.
• [For Experimental Features] Documentation to be submitted in a separate PR.

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'Test Suite Duration'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.20.

Benchmark suite	Current: e15bdd7	Previous: eb3eef9	Ratio
test_report_zkpassport_noir_rsa_	3 s	2 s	1.50

This comment was automatically generated by workflow using github-action-benchmark.

CC: @TomAFrench

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'Execution Time'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.20.

Benchmark suite	Current: e15bdd7	Previous: eb3eef9	Ratio
semaphore-depth-10	0.027 s	0.02 s	1.35

This comment was automatically generated by workflow using github-action-benchmark.

CC: @TomAFrench