[move][examples] Remove hard testnet dependency (MystenLabs#15428)

## Description 

- Removed direct link to testnet 

## Test Plan 

- ran tests 

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

examples/move/locked_stake/Move.toml

@@ -3,8 +3,8 @@ name = "Locked Stake"
 version = "0.0.1"
 
 [dependencies]
-Sui = { git = "https://github.com/MystenLabs/sui.git", subdir = "crates/sui-framework/packages/sui-framework", rev = "framework/testnet" }
-SuiSystem = { git = "https://github.com/MystenLabs/sui.git", subdir = "crates/sui-framework/packages/sui-system", rev = "framework/testnet" }
+Sui = { local = "../../../crates/sui-framework/packages/sui-framework" }
+SuiSystem = { local = "../../../crates/sui-framework/packages/sui-system" }
 
 [addresses]
 locked_stake = "0x0"

examples/move/object_bound/Move.toml

@@ -3,7 +3,7 @@ name = "ObjectBound"
 version = "0.0.1"
 
 [dependencies]
-Sui = { git = "https://github.com/MystenLabs/sui.git", subdir = "crates/sui-framework/packages/sui-framework", rev = "framework/testnet" }
+Sui = { local = "../../../crates/sui-framework/packages/sui-framework" }
 
 [addresses]
 obo = "0x0"