[GraphQL/MovePackage] Query by ID and version

## Description

Implement `Query.package` and `MovePackage.atVersion` to query a
package at a specific version, using the new fields added to the
`packages` table, exposed via some new data loaders.

## Test plan

New transactional tests:

```
sui$ cargo nextest run -p sui-graphql-e2e-tests \
  --features pg_integration                     \
  -- packages/versioning
```

crates/sui-graphql-e2e-tests/tests/packages/versioning.exp

@@ -0,0 +1,310 @@
+processed 9 tasks
+
+init:
+A: object(0,0)
+
+task 1 'publish'. lines 6-9:
+created: object(1,0), object(1,1)
+mutated: object(0,0)
+gas summary: computation_cost: 1000000, storage_cost: 5076800, storage_rebate: 0, non_refundable_storage_fee: 0
+
+task 2 'upgrade'. lines 11-15:
+created: object(2,0)
+mutated: object(0,0), object(1,1)
+gas summary: computation_cost: 1000000, storage_cost: 5251600, storage_rebate: 2595780, non_refundable_storage_fee: 26220
+
+task 3 'upgrade'. lines 17-22:
+created: object(3,0)
+mutated: object(0,0), object(1,1)
+gas summary: computation_cost: 1000000, storage_cost: 5426400, storage_rebate: 2595780, non_refundable_storage_fee: 26220
+
+task 4 'create-checkpoint'. lines 24-24:
+Checkpoint created: 1
+
+task 5 'run-graphql'. lines 26-45:
+Response: {
+ "data": {
+ "v1": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ }
+ ]
+ }
+ }
+ },
+ "v2": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ }
+ ]
+ }
+ }
+ },
+ "v3": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ },
+ {
+ "name": "h"
+ }
+ ]
+ }
+ }
+ }
+ }
+}
+
+task 6 'run-graphql'. lines 47-84:
+Response: {
+ "data": {
+ "v1_from_p1": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ }
+ ]
+ }
+ }
+ },
+ "v1_from_p2": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ }
+ ]
+ }
+ }
+ },
+ "v2_from_p0": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ }
+ ]
+ }
+ }
+ },
+ "v2_from_p2": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ }
+ ]
+ }
+ }
+ },
+ "v3_from_p0": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ },
+ {
+ "name": "h"
+ }
+ ]
+ }
+ }
+ },
+ "v3_from_p1": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ },
+ {
+ "name": "h"
+ }
+ ]
+ }
+ }
+ }
+ }
+}
+
+task 7 'run-graphql'. lines 86-141:
+Response: {
+ "data": {
+ "v1": {
+ "v1": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ }
+ ]
+ }
+ }
+ },
+ "v2": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ }
+ ]
+ }
+ }
+ },
+ "v3": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ },
+ {
+ "name": "h"
+ }
+ ]
+ }
+ }
+ }
+ },
+ "v2": {
+ "v1": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ }
+ ]
+ }
+ }
+ },
+ "v2": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ }
+ ]
+ }
+ }
+ },
+ "v3": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ },
+ {
+ "name": "h"
+ }
+ ]
+ }
+ }
+ }
+ },
+ "v3": {
+ "v1": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ }
+ ]
+ }
+ }
+ },
+ "v2": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ }
+ ]
+ }
+ }
+ },
+ "v3": {
+ "module": {
+ "functions": {
+ "nodes": [
+ {
+ "name": "f"
+ },
+ {
+ "name": "g"
+ },
+ {
+ "name": "h"
+ }
+ ]
+ }
+ }
+ }
+ }
+ }
+}
+
+task 8 'run-graphql'. lines 143-171:
+Response: {
+ "data": {
+ "v0": null,
+ "v1": {
+ "v0": null,
+ "v4": null
+ },
+ "v4": null
+ }
+}