Cast support for RunEndEncoded arrays (#8589)

# Which issue does this PR close?

- Contribues towards the RunEndEncoded (REE) epic #3520, but there is no
specific issue for casting.
- Replaces PRs #7713 and
#8384.

# Rationale for this change

This PR implements casting support for RunEndEncoded arrays in Apache
Arrow.

# What changes are included in this PR?
- `run_end_encoded_cast` in `arrow-cast/src/cast/run_array.rs`
- `cast_to_run_end_encoded` in `arrow-cast/src/cast/run_array.rs`
- Tests in `arrow-cast/src/cast/mod.rs`

# Are these changes tested?
Yes!

# Are there any user-facing changes?

No breaking changes, just new functionality

---------

Co-authored-by: Richard Baah <richard.baah@datadoghq.com>
Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>

Author: 3 people

arrow-cast/Cargo.toml

@@ -43,6 +43,7 @@ force_validate = []
 arrow-array = { workspace = true }
 arrow-buffer = { workspace = true }
 arrow-data = { workspace = true }
+arrow-ord = { workspace = true }
 arrow-schema = { workspace = true }
 arrow-select = { workspace = true }
 chrono = { workspace = true }