Add arrow-avro Decoder Benchmarks (apache#8025)

# Which issue does this PR close?

- Part of apache#4886

# Rationale for this change

This change introduces a comprehensive benchmark suite for the
`arrow-avro` decoder. Having robust benchmarks is crucial for several
reasons:
- It allows for the measurement and tracking of decoding performance
over time.
- It helps identify performance regressions or improvements as the
codebase evolves.
- It provides a standardized way to evaluate the impact of optimizations
and new features.

# What changes are included in this PR?

This PR adds a new benchmark file: `arrow-avro/benches/decoder.rs`.

The key components of this new file are:
- **Comprehensive Type Coverage**: Adds benchmark scenarios for a wide
range of data types, including:
- Primitive types (`Int32`, `Int64`, `Float32`, `Float64`, `Boolean`)
    - Binary and String types (`Binary(Bytes)`, `String`, `StringView`)
- Logical types (`Date32`, `TimeMillis`, `TimeMicros`,
`TimestampMillis`, `TimestampMicros`, `Decimal128`, `UUID`, `Interval`,
`Enum`)
    - Complex types (`Map`, `Array`, `Nested(Struct)`)
    - `FixedSizeBinary`
    - A `Mixed` schema with multiple fields
- Update to criterion 7.0.0
- Made `mod schema` public

# Are these changes tested?

These changes are covered by the benchmark tests themselves.

# Are there any user-facing changes?

N/A

Author: jecsand838

arrow-avro/Cargo.toml

@@ -65,13 +65,20 @@ rand = { version = "0.9.1", default-features = false, features = [
     "std_rng",
     "thread_rng",
 ] }
-criterion = { version = "0.6.0", default-features = false }
+criterion = { version = "0.7.0", default-features = false }
 tempfile = "3.3"
 arrow = { workspace = true }
 futures = "0.3.31"
 bytes = "1.10.1"
 async-stream = "0.3.6"
+apache-avro = "0.14.0"
+num-bigint = "0.4"
+once_cell = "1.21.3"
 
 [[bench]]
 name = "avro_reader"
 harness = false
+
+[[bench]]
+name = "decoder"
+harness = false