use enum_dispatch (#615)

### Description

we were initially considering using `dyn trait` to address the concerns around having too many match statements. however, since dyn trait has a performance concern, we decided to go with `enum_dispatch`, which is 10x performant 

### Test Plan

![Screenshot 2024-11-22 at 11.59.24 AM.png](https://graphite-user-uploaded-assets-prod.s3.amazonaws.com/XVbPtMdqqe4K1PNnLQvf/8d2f07cb-3d20-49fb-af53-22e0245273b2.png)

rust/Cargo.toml

@@ -146,3 +146,4 @@ serde_canonical_json = "1.0.0"
 allocative = "0.3.3"
 allocative_derive = "0.3.3"
 mockall = "0.12.1"
+downcast-rs = "1.2.1"

rust/integration-tests/Cargo.toml

@@ -22,27 +22,14 @@ aptos-protos = { workspace = true }
 assert-json-diff = { workspace = true }
 bigdecimal = { workspace = true }
 chrono = { workspace = true }
-clap = { workspace = true }
 diesel = { workspace = true }
-dirs = { workspace = true }
 field_count = { workspace = true }
-futures = { workspace = true }
-itertools = { workspace = true }
-json-structural-diff = { workspace = true }
-once_cell = { workspace = true }
 processor = { workspace = true }
-prost = { workspace = true }
-regex = { workspace = true }
 sdk-processor = { workspace = true }
 serde = { workspace = true }
-serde_canonical_json = { workspace = true }
 serde_json = { workspace = true }
-tempfile = { workspace = true }
 testcontainers = { workspace = true }
-testing-transactions = { workspace = true }
 tokio = { workspace = true }
-tonic = { workspace = true }
-url = { workspace = true }
 
 [dev-dependencies]
 ahash = { workspace = true }

rust/processor/Cargo.toml

@@ -17,7 +17,6 @@ ahash = { workspace = true }
 allocative = { workspace = true }
 allocative_derive = { workspace = true }
 anyhow = { workspace = true }
-aptos-indexer-processor-sdk = { workspace = true }
 aptos-moving-average = { workspace = true }
 aptos-protos = { workspace = true }
 async-trait = { workspace = true }
@@ -63,7 +62,6 @@ url = { workspace = true }
 
 # Postgres SSL support
 native-tls = { workspace = true }
-num = { workspace = true }
 postgres-native-tls = { workspace = true }
 tiny-keccak = { workspace = true }
 tokio-postgres = { workspace = true }

rust/sdk-processor/Cargo.toml

@@ -12,39 +12,31 @@ aptos-indexer-processor-sdk = { workspace = true }
 aptos-indexer-processor-sdk-server-framework = { workspace = true }
 aptos-indexer-testing-framework = { workspace = true }
 async-trait = { workspace = true }
-bcs = { workspace = true }
-bigdecimal = { workspace = true }
 chrono = { workspace = true }
 clap = { workspace = true }
 diesel = { workspace = true }
 diesel-async = { workspace = true }
 diesel_migrations = { workspace = true }
+enum_dispatch = { workspace = true }
 field_count = { workspace = true }
 futures = { workspace = true }
 futures-util = { workspace = true }
 
 google-cloud-storage = { workspace = true }
-hex = { workspace = true }
 jemallocator = { workspace = true }
-kanal = { workspace = true }
 lazy_static = { workspace = true }
 
-mockall = { workspace = true }
-
 # Postgres SSL support
 native-tls = { workspace = true }
 num_cpus = { workspace = true }
 # Parquet support
 parquet = { workspace = true }
-parquet_derive = { workspace = true }
 postgres-native-tls = { workspace = true }
 processor = { workspace = true }
 rayon = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
-sha2 = { workspace = true }
 strum = { workspace = true }
-tiny-keccak = { workspace = true }
 tokio = { workspace = true }
 tokio-postgres = { workspace = true }
 tracing = { workspace = true }