[kv store] basic bigtable client (#19890)

## Description 
Initial implementation of a KV store on top of BigTable.
notes:
* includes instructions for setting up a local BigTable instance via the
emulator and a basic script for data ingestion(later will be added as an
option to main ingestion binary)
* generated proto files are included in the repo, so users won't have to
compile the definitions themselves or install the `protoc` dependency.
We can add an optional build step in a follow-up PR


---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

Cargo.toml

@@ -121,6 +121,7 @@ members = [
     "crates/sui-json-rpc-tests",
     "crates/sui-json-rpc-types",
     "crates/sui-keys",
+    "crates/sui-kvstore",
     "crates/sui-light-client",
     "crates/sui-macros",
     "crates/sui-metric-checker",
@@ -346,6 +347,7 @@ futures-core = "0.3.21"
 git-version = "0.3.5"
 glob = "0.3.1"
 governor = "0.6.0"
+gcp_auth = "0.12.3"
 hashbrown = "0.12"
 hdrhistogram = "7.5.1"
 hex = "0.4.3"
@@ -420,6 +422,7 @@ proptest = "1.1.0"
 proptest-derive = "0.3.0"
 prost = "0.13"
 prost-build = "0.13"
+prost-types = "0.13.1"
 protobuf = { version = "2.28", features = ["with-bytes"] }
 quinn-proto = "0.11.7"
 quote = "1.0.23"

crates/sui-kvstore/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "sui-kvstore"
+authors = ["Mysten Labs <[email protected]>"]
+license = "Apache-2.0"
+publish = false
+edition = "2021"
+version.workspace = true
+
+[dependencies]
+anyhow.workspace = true
+async-trait.workspace = true
+base64.workspace = true
+bcs.workspace = true
+http.workspace = true
+gcp_auth.workspace = true
+prometheus.workspace = true
+prost.workspace = true
+prost-types.workspace = true
+serde.workspace = true
+sui-data-ingestion-core.workspace = true
+sui-types.workspace = true
+telemetry-subscribers.workspace = true
+tokio = { workspace = true, features = ["full"] }
+tonic = {version = "0.12.2",features = ["tls", "transport"] }
+tracing.workspace = true

crates/sui-kvstore/src/bigtable/README.md

@@ -0,0 +1,16 @@
+## Setup
+
+### Local development
+- install the `cbt` CLI tool
+```sh
+gcloud components install cbt
+```
+- start the emulator
+```sh
+gcloud beta emulators bigtable start
+```
+- set `BIGTABLE_EMULATOR_HOST` environment variable
+```sh
+$(gcloud beta emulators bigtable env-init)
+```
+- Run `./src/bigtable/init.sh` to configure the emulator